2013 Mercedes-benz M Class Owners Manual

tire is penetrated by a foreign object. In the event of a sudden loss of pressure, bring the vehicle to a halt by braking carefully. Avoid abrupt steering maneuvers. The function of the tire pressure loss warning system is limited or delayed if: Rsnow chains are mounted on your vehicle's

tires.

Rroad conditions are wintry. Ryou are driving on sand or gravel.

406 Tire pressure

Ryou adopt a very sporty driving style

(cornering at high speeds or driving with high rates of acceleration).

Ryou are towing a very heavy or large trailer. Ryou are driving with a heavy load (in the

vehicle or on the roof).

Restarting the tire pressure loss warning system Restart the tire pressure loss warning system if you have: Rchanged the tire pressure Rchanged the wheels or tires Rmounted new wheels or tires X Before restarting, make sure that the tire pressures are set properly on all four tires for the respective operating conditions. The recommended tire pressures can be found on the Tire and Loading Information placard on the B-pillar on the driver's side or the tire pressure table on the fuel filler flap. The tire pressure loss warning system can only give reliable warnings if you have set the correct tire pressure. If an incorrect tire pressure is set, these incorrect values will be monitored.

X Also observe the notes in the section on tire

pressures (Y page 402).

X Make sure that the SmartKey is in position

2 in the ignition lock (Y page 157). X Press the = or ; button on the steering wheel to select the Serv. menu. X Press the 9 or : button to select Tire Pressure. X Press the a button. The Run Flat Indicator active Restart with OK message appears in the multifunction display.

If you wish to confirm the restart: X Press the a button. The Tire Pressure Now OK? message appears in the multifunction display. X Press the 9 or : button to select Yes. X Press the a button. The Run Flat Indicator Restarted message appears in the multifunction display. After a teach-in period, the tire pressure loss warning system will monitor the set tire pressures of all four tires.

If you wish to cancel the restart: X Press the % button. or X If the Tire Pressure Now OK? message appears, use the 9 or : button to select Cancel. X Press the a button.

The tire pressure values stored at the last restart will continue to be monitored.

Tire pressure monitor General notes If a tire pressure monitor is installed, the vehicle's wheels have sensors that monitor the tire pressures in all four tires. The tire pressure monitor warns you if the pressure drops in one or more of the tires. The tire pressure monitor only functions if the correct sensors are installed on all wheels. Information on tire pressures is displayed in the multifunction display. After a few minutes of driving, the current tire pressure of each tire is shown in the Serv. menu of the multifunction display. For further information on displaying this message, refer to the "Checking the tire pressure electronically" section (Y page 408).

Tire pressure 407

system is not operating properly. The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the warning lamp will flash for approximately a minute and then remain continuously illuminated. This sequence will be repeated every time the vehicle is started as long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of incompatible replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly.

It is the driver's responsibility to set the tire pressure to that recommended for cold tires which is suitable for the operating situation (Y page 402). Note that the correct tire pressure for the current operating situation must first be taught-in to the tire pressure monitor. If there is a substantial loss of pressure, the warning threshold for the warning message is aligned to the reference values taught-in. Restart the tire pressure monitor after adjusting the pressure of the cold tires (Y page 409). The current pressures are saved as new reference values. As a result, a warning message will appear if the tire pressure drops significantly. The tire pressure monitor does not warn you of an incorrectly set tire pressure. Observe the notes on the recommended tire pressure (Y page 402). The tire pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the tire is penetrated by a foreign object. In the event of a sudden loss of pressure, bring the

Example: current tire pressure display

Important safety notes G WARNING Each tire, including the spare (if provided), should be checked at least once a month when cold and inflated to the pressure recommended by the vehicle manufacturer on the Tire and Loading Information placard on the driver's door B-pillar or the tire pressure label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the size indicated on the Tire and Loading Information placard or the tire pressure label, you should determine the proper tire pressure for those tires. As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires are significantly underinflated. Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if underinflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale. USA only: Your vehicle has also been equipped with a TPMS malfunction indicator to indicate if the

408 Tire pressure

vehicle to a halt by braking carefully. Avoid abrupt steering maneuvers. The tire pressure monitor has a yellow warning lamp in the instrument cluster for indicating pressure loss/malfunctions (USA) or pressure loss (Canada). Whether the warning lamp flashes or lights up indicates whether a tire pressure is too low or the tire pressure monitor is malfunctioning: Rif the warning lamp is lit continuously, the

tire pressure on one or more tires is significantly too low. The tire pressure monitor is not malfunctioning.

RUSA only: if the warning lamp flashes for

around a minute and then remains lit constantly, the tire pressure monitor is malfunctioning.

USA only: if there is a malfunction with the tire pressure monitor it can take more than ten minutes until the malfunction is shown by the tire pressure warning lamp flashing for approximately one minute and then lighting up continuously. When the malfunction has been rectified, the tire pressure warning lamp goes out after a few minutes of driving. The tire pressure values indicated by the on- board computer may differ from those measured at a gas station with a pressure gauge. The tire pressures shown by the on- board computer refer to those measured at sea level. At high altitudes, the tire pressure values indicated by a pressure gauge are higher than those shown by the on-board computer. In this case, do not reduce the tire pressures. The operation of the tire pressure monitor can be affected by interference from radio transmitting equipment (e.g. radio headphones, two-way radios) that may be being operated in or near the vehicle.

Checking the tire pressure electronically X Make sure that the SmartKey is in position

2 in the ignition lock (Y page 157). X Press the = or ; button on the steering wheel to select the Service menu. X Press the 9 or : button to select Tire Pressure. X Press the a button.

The current tire pressure of each tire is shown in the multifunction display. If the vehicle has been parked for longer than 20 minutes, the Tire pressure will be displayed after driving a few minutes message appears. After a teach-in process, the tire pressure monitor automatically detects new wheels or new sensors. As long as a clear allocation of the tire pressure value to the individual wheels is not possible, the Tire Pressure Monitor Active display message is shown instead of the tire pressure display. The tire pressures are already being monitored. i If an emergency spare wheel is mounted, the system may continue to show the tire pressure of the wheel that has been removed for a few minutes. If this occurs, note that the value displayed for the position where the spare wheel is mounted is not the same as the current tire pressure of the emergency spare wheel.

Tire pressure monitor warning messages If the tire pressure monitor detects a pressure loss in one or more tires, a warning message is shown in the multifunction display. A warning tone also sounds and the tire pressure warning lamp lights up in the instrument cluster. Each tire that is affected by a significant loss of pressure is highlighted in the pressure display. RIf the Correct Tire Pressure message appears in the multifunction display, the tire pressure in at least one tire is too low and must be corrected at the next opportunity. RIf the Check Tires message appears in the multifunction display, the tire pressure in one or more tires has dropped significantly and the tires must be checked. RIf the Warning Tire Malfunction message appears in the multifunction display, the tire pressure in one or more tires has dropped suddenly and the tires must be checked.

i If the wheel positions on the vehicle are

rotated, the tire pressures may be displayed for the wrong positions for a short time. This is rectified after a few minutes of driving, and the tire pressures are displayed for the correct positions.

Restarting the tire pressure monitor When you restart the tire pressure monitor, all existing warning messages are deleted and the warning lamps go out. The monitor uses the currently set tire pressures as the reference values for monitoring. In most cases, the tire pressure monitor will automatically detect the new reference values after you have changed the tire pressure. However, you can also define reference values manually as described here. The tire pressure monitor then monitors the new tire pressure values.

Tire pressure 409

X Set the tire pressure to the value

recommended for the corresponding driving situation on the Tire and Loading Information placard on the B-pillar on the driver's side (Y page 402). Additional tire pressure values for different loads can also be found on the tire pressure table on the inside of the fuel filler flap (Y page 174).

X Make sure that the tire pressure is correct

on all four wheels.

X Make sure that the SmartKey is in position

2 in the ignition lock. X Press the = or ; button on the steering wheel to select the Serv. menu. X Press the 9 or : button to select Tire Pressure. X Press the a button.

The multifunction display shows the current tire pressure for the individual tires or the Tire pressure will be displayed after driving a few minutes message. X Press the : button. The Use current pressures as new reference values message appears in the multifunction display.

If you wish to confirm the restart: X Press the a button. The Tire Press. Monitor Restarted message appears in the multifunction display. After driving for a few minutes, the system checks whether the current tire pressures are within the specified range. The new tire pressures are then accepted as reference values and monitored.

If you wish to cancel the restart: X Press the % button.

The tire pressure values stored at the last restart will continue to be monitored.

410 Loading the vehicle

Loading the vehicle Instruction labels for tires and loads G WARNING Overloaded tires can overheat, causing a blowout. Overloaded tires can also impair the steering and driving characteristics and lead to brake failure. There is a risk of accident. Observe the load rating of the tires. The load rating must be at least half of the GAWR of your vehicle. Never overload the tires by exceeding the maximum load.

Two instruction labels on your vehicle show the maximum possible load. (1) The Tire and Loading Information placard is on the B-pillar on the driver's side. The Tire and Loading Information placard shows the maximum permissible number of occupants and the maximum permissible vehicle load. It also contains details of the tire sizes and corresponding pressures for tires mounted at the factory.

(2) The vehicle identification plate is on the B-pillar on the driver's side. The vehicle identification plate informs you of the gross vehicle weight rating. It is made up of the vehicle weight, all vehicle occupants, the fuel and the cargo. You can also find information about the maximum gross axle weight rating on the front and rear axle. The maximum gross axle weight rating is the maximum weight that can be carried by one axle (front or rear axle). Never exceed the maximum load or the maximum gross axle weight rating for the front or rear axle.

: B-pillar, driver's side

Maximum permissible gross vehicle weight rating

X Specification for maximum gross vehicle weight : is listed in the Tire and Loading Information placard: "The combined weight of occupants and cargo should never exceed XXX kilograms or XXX lbs."

The gross weight of all vehicle occupants, load and luggage must not exceed the specified value. i The specifications shown on the Tire and

Loading Information placard in the illustration are examples. The maximum permissible gross vehicle weight rating is vehicle-specific and may differ from that in the illustration. You can find the valid

Loading the vehicle 411

your vehicle’s Tire and Loading Information placard.

X Step 2: Determine the combined weight of the driver and passengers that will be riding in your vehicle.

X Step 3: Subtract the combined weight of

the driver and passengers from XXX kilograms or XXX lbs.

X Step 4: The resulting figure equals the

available amount of cargo and luggage load capacity. For example, if the "XXX" amount equals 1,400 lbs and there will be five 150 lbs passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lbs (1,400 – 750 (5 x 150) = 650 lbs).

X Step 5: Determine the combined weight of

luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in step 4.

maximum permissible gross vehicle weight rating for your vehicle on the Tire and Loading Information placard.

Number of seats

Maximum number of seats : indicates the maximum number of occupants allowed to travel in the vehicle. This information can be found on the Tire and Loading Information placard. i The specifications shown on the Tire and

Loading Information placard in the illustration are examples. The number of seats is vehicle-specific and can differ from the details shown. The number of seats in your vehicle can be found on the Tire and Loading Information placard.

Determining the correct load limit Step-by-step instructions The following steps have been developed as required of all manufacturers under Title 49, Code of U.S. Federal Regulations, Part 575
pursuant to the "National Traffic and Motor Vehicle Safety Act of 1966". X Step 1: Locate the statement "The

combined weight of occupants and cargo should never exceed XXX kg or XXX lbs." on

412 Loading the vehicle

Example: steps 1 to 3
The following table shows examples on how to calculate total and cargo load capacities with varying seating configurations and number and size of occupants. The following examples use a maximum load of 1,500 lbs (680 kg). This is for illustration purposes only. Make sure you are using the actual load limit for your vehicle stated on your vehicle's Tire and Loading Information placard (Y page 410). The greater the combined weight of the occupants, the lower the maximum luggage load. Additional information when towing a trailer (Y page 253). Step 1

Combined maximum weight of occupants and cargo (data from the Tire and Loading Information placard)

Step 2

Number of people in the vehicle (driver and occupants) Distribution of the occupants Weight of the occupants

Gross weight of all occupants

Example 1
1500 lbs (680 kg)

Example 2
1500 lbs (680 kg)

Example 3
1500 lbs (680 kg)

Example 1

Example 2

Example 3

Front: 2
Rear: 3
Occupant 1: 150 lbs (68 kg) Occupant 2: 180 lbs (82 kg) Occupant 3: 160 lbs (73 kg) Occupant 4: 140 lbs (63 kg) Occupant 5: 120 lbs (54 kg) 750 lbs (340 kg)

Front: 1

Occupant 1: 150 lbs (68 kg)

Front: 1
Rear: 2
Occupant 1: 200 lbs (91 kg) Occupant 2: 190 lbs (86 kg) Occupant 3: 150 lbs (68 kg)

540 lbs (245 kg)

150 lbs (68 kg)

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413

Example 1
1500 lbs (680 kg) Ò750 lbs (340 kg) = 750 lbs (340 kg)

Example 2
1500 lbs (680 kg) Ò540 lbs (245 kg) = 960 lbs (435 kg)

Example 3
1500 lbs (680 kg) Ò150 lbs (68 kg) = 1350 lbs (612 kg)

Step 3

Permissible load (maximum gross vehicle weight rating from the Tire and Loading Information placard minus the gross weight of all occupants)

Vehicle identification plate Even if you have calculated the total cargo carefully, you should still make sure that the gross vehicle weight rating and the gross axle weight rating are not exceeded. Details can be found on the vehicle identification plate on the B-pillar on the driver's side of the vehicle (Y page 410). Permissible gross vehicle weight: the gross weight of the vehicle, all passengers, load and trailer load/noseweight (if applicable) must not exceed the permissible gross vehicle weight. Gross axle weight rating: the maximum permissible weight that can be carried by one axle (front or rear axle). To ensure that your vehicle does not exceed the maximum permissible values (gross vehicle weight and maximum gross axle weight rating), have your loaded vehicle (including driver, occupants, cargo, and full trailer load if applicable) weighed on a suitable vehicle weighbridge.

Trailer load/noseweight The trailer load/noseweight affects the gross weight of the vehicle. If a trailer is attached, the trailer load/noseweight is included in the load along with occupants and luggage. The trailer load/noseweight is usually approximately 8% of the gross weight of the trailer and its cargo.

All about wheels and tires Uniform Tire Quality Grading Standards Overview of Tire Quality Grading Standards

Uniform Tire Quality Grading Standards are U.S. government specifications. Their purpose is to provide drivers with uniform reliable information on tire performance data. Tire manufacturers have to grade tires using three performance factors: : tread wear grade, ; traction grade and = temperature grade. These regulations do not apply to Canada. Nevertheless, all tires sold in North America are provided with the corresponding quality grading markings on the sidewall of the tire. Where applicable, the tire grading information can be found on the tire sidewall between the tread shoulder and maximum tire width.

414 All about wheels and tires

Example: RTreadwear grade: 200
RTraction grade: AA RTemperature grade: A All passenger car tires must conform to the statutory safety requirements in addition to these grades. i The actual values for tires are vehicle-

specific and may deviate from the values in the illustration.

Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified U.S. government course. For example, a tire graded 150 would wear one and one-half times as well on the government test track as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm, due to variations in driving habits, service practices and differences in road characteristics and climate conditions.

Traction G WARNING The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.

! Avoid wheelspin. This can lead to damage

to the drive train.

The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire's ability to stop on a wet surface as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.

The safe speed on a wet, snow covered or icy road is always lower than on dry road surfaces. You should pay special attention to road conditions when temperatures are around freezing point. Mercedes-Benz recommends a minimum tread depth of ã in (4 mm) on all four winter tires. Observe the legally required minimum tire tread depth (Y page 399). Winter tires can reduce the braking distance on snow-covered surfaces in comparison with summer tires. The braking distance is still much further than on surfaces that are not icy or covered with snow. Take appropriate care when driving. Further information on winter tires (M+S tires) (Y page 400).

Temperature G WARNING The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause excessive heat build-up and possible tire failure.

The temperature grades are A (the highest), B, and C. These represent the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.

Tire labeling Overview

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415

Therefore, only use tire types and sizes approved for your vehicle model. Observe the tire load rating and speed rating required for your vehicle.

: Uniform Tire Quality Grading Standard

; DOT, Tire Identification Number

(Y page 419)

(Y page 418)

= Maximum tire load (Y page 417) ? Maximum tire pressure (Y page 404) A Manufacturer B Tire material (Y page 418) C Tire size designation, load-bearing

capacity and speed index (Y page 415)

D Load index (Y page 417) E Tire name The markings described above are on the tire in addition to the tire name (sales designation) and the manufacturer's name. i Tire data is vehicle-specific and may deviate from the data in the example.

Tire size designation, load-bearing capacity and speed rating G WARNING Exceeding the stated tire load-bearing capacity and the approved maximum speed could lead to tire damage or the tire bursting. There is a risk of accident.

: Tire width ; Nominal aspect ratio in % = Tire code ? Rim diameter A Load bearing index B Speed rating General: depending on the manufacturer's standards, the size imprinted in the tire wall may not contain any letters or may contain one letter that precedes the size description. If there is no letter preceding the size description (as shown above): these are passenger vehicle tires according to European manufacturing standards. If "P" precedes the size description: these are passenger vehicle tires according to U.S. manufacturing standards. If "LT" precedes the size description: these are light truck tires according to U.S. manufacturing standards. If "T" precedes the size description: these are compact emergency spare wheels at high tire pressure, to be used only temporarily in an emergency. Tire width: tire width : shows the nominal tire width in millimeters. Height-width ratio: aspect ratio ; is the size ratio between the tire height and tire width and is shown as a percentage. The

416 All about wheels and tires

aspect ratio is calculated by dividing the tire width by the tire height. Tire code: tire code = specifies the tire type. "R" represents radial tires; "D" represents diagonal tires; "B" represents diagonal radial tires. Optionally, tires with a maximum speed of over 149 mph (240 km/h) may have "ZR" in the size description, depending on the manufacturer (e.g. 245/40 ZR 18). Rim diameter: rim diameter ? is the diameter of the bead seat, not the diameter of the rim flange. The rim diameter is specified in inches (in). Load-bearing index: load-bearing index A is a numerical code that specifies the maximum load-bearing capacity of a tire. Do not overload the tires by exceeding the specified load limit. The maximum permissible load can be found on the vehicle's Tire and Loading Information placard on the B-pillar on the driver's side (Y page 410). Example: The load bearing index 91 indicates a maximum load of 1356 lb (615 kg) that the tires can bear. For further information on the maximum tire load in kilograms and pounds, see (Y page 417). For further information on the load bearing index, see "Load index" (Y page 417). Speed rating: speed rating B specifies the approved maximum speed of the tire. i Tire data is vehicle-specific and may deviate from the data in the example. Regardless of the speed rating, always observe the speed limits. Drive carefully and adapt your driving style to the traffic conditions. Summer tires Index

Speed rating up to 100 mph (160 km/h) up to 106 mph (170 km/h)

Index ZR...Y ZR...(..Y) ZR

Speed rating up to 112 mph (180 km/h) up to 118 mph (190 km/h) up to 130mph (210 km/h) up to 149 mph (240 km/h) up to 168 mph (270 km/h) up to 186 mph (300 km/h) up to 186 mph (300 km/h) over 186 mph (300 km/h) over 149 mph (240 km/h)

ROptionally, tires with a maximum speed of over 149 mph (240 km/h) may have a “ZR” in the size description, depending on the manufacturer (e.g. 245/40 ZR18). The service specification is made up of load-bearing index A and speed rating B.

RIf the size description of your tire includes

"ZR" and there are no service specifications, ask the tire manufacturer in order to find out the maximum speed. If a service specification is available, the maximum speed is limited according to the speed rating in the service specification. Example: 245/40 ZR 18 97 Y. In this example, "97 Y" is the service specification. The letter "Y" represents the speed rating and the maximum speed of the tire is limited to 186 mph (300km/h).

REvery tire that has a maximum speed of

more than 186 mph (300 km/h) must have a "ZR" in the size description and the service specification must be given in parentheses. Example: 275/40 ZR 18 (99 Y). The speed rating "(Y)" indicates that the maximum speed of the tire is over 186 mph (300 km/h). Ask the tire manufacturer about the maximum speed.

All-weather tires and winter tires Index Q M+S2
T M+S2
H M+S2
V M+S2

Speed rating up to 100 mph (160 km/h) up to 118 mph (190 km/h) up to 130mph (210 km/h) up to 149 mph (240 km/h)

i Not all tires with the M+S marking provide the driving characteristics of winter tires. In addition to the M+S marking, winter tires also have the i snowflake symbol on the tire wall. Tires with this marking fulfill the requirements of the Rubber Manufacturers Association (RMA) and the Rubber Association of Canada (RAC) regarding the tire traction on snow. They have been especially developed for driving on snow.

An electronic speed limiter prevents your vehicle from exceeding the following speeds: Rall vehicles (except AMG vehicles):

130 mph (210 km/h)

RAMG vehicles: 155 mph (250 km/h) RAMG vehicles with increased top speed:

174 mph (280 km/h)

The speed rating of tires mounted at the factory may be higher than the maximum speed that the electronic speed limiter permits. Make sure that your tires have the required speed rating, e.g. when buying new tires. The required speed rating for your vehicle can be found in the "Tires" section (Y page 426). Further information about reading tire data can be obtained from any qualified specialist workshop.

2 or M+Si for winter tires.

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417

Load index

In addition to the load bearing index, load index : may be imprinted after the letters that identify the speed index B on the sidewall of the tire (Y page 415). RIf no specification is given: no text (as in the

example above), represents a standard load (SL) tire

RXL or Extra Load: represents a reinforced

tire

RLight Load: represents a light load tire RC, D, E: represents a load range that

depends on the maximum load that the tire can carry at a certain pressure

i Tire data is vehicle-specific and may deviate from the data in the example.

Maximum load rating

Maximum tire load : is the maximum permissible weight for which the tire is approved.

418 All about wheels and tires

Do not overload the tires by exceeding the specified load limit. The maximum permissible load can be found on the vehicle's Tire and Loading Information placard on the B-pillar on the driver's side (Y page 410). i The actual values for tires are vehicle-

specific and may deviate from the values in the illustration.

DOT, Tire Identification Number (TIN) U.S. tire regulations prescribe that every tire manufacturer or retreader must imprint a TIN in or on the sidewall of every tire produced.

Tire size: identifier = describes the tire size. Tire type code: tire type code ? can be used by the manufacturer as a code to describe specific characteristics of the tire. Date of manufacture: date of manufacture A provides information about the age of a tire. The first and second positions represent the week of manufacture, starting with "01" for the first calendar week. Positions three and four represent the year of manufacture. For example, a tire that is marked with "3208", was manufactured in week 32 in 2008. i Tire data is vehicle-specific and may deviate from the data in the example.

Tire characteristics

The TIN is a unique identification number. The TIN enables the tire manufacturers or retreaders to inform purchasers of recalls and other safety-relevant matters. It makes it possible for the purchaser to easily identify the affected tires. The TIN is made up of manufacturer identification code ;, tire size =, tire type code ? and manufacturing date A. DOT (Department of Transportation): tire symbol : indicates that the tire complies with the requirements of the U.S. Department of Transportation. Manufacturer identification code: manufacturer identification code ; provides details on the tire manufacturer. New tires have a code with two symbols. Retreaded tires have a code with four symbols. For further information about retreaded tires, see (Y page 426).

This information describes the type of tire cord and the number of layers in sidewall : and under tire tread ;. i Tire data is vehicle-specific and may deviate from the data in the example.

Definition of terms for tires and loading Tire ply composition and material used Describes the number of plies or the number of layers of rubber-coated fabric in the tire tread and sidewall. These are made of steel, nylon, polyester and other materials. Bar Metric unit for tire pressure. 14.5038 pounds per square inch (psi) and

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419

100 kilopascals (kPa) are the equivalent of 1 bar. DOT (Department of Transportation) DOT marked tires fulfill the requirements of the United States Department of Transportation. Normal occupant weight The number of occupants which the vehicle is designed for, multiplied by 68 kilograms (150 lb). Uniform Tire Quality Grading Standards A uniform standard to grade the quality of tires with regards to tread quality, tire traction and temperature characteristics. Ratings are determined by tire manufacturers using U.S. government testing procedures. The ratings are molded into the sidewall of the tire. Recommended tire pressure The recommended tire pressure applies to the tires mounted at the factory. The Tire and Loading Information placard contains the recommended tire pressures for cold tires on a fully loaded vehicle and for the maximum permissible vehicle speed. The tire pressure table contains the recommended pressures for cold tires for various operating conditions, i.e. differing load and speed conditions. Increased vehicle weight due to optional equipment This is the combined weight of all standard and optional equipment available for the vehicle, regardless of whether it is actually installed on the vehicle or not. Rim This is the part of the wheel on which the tire is mounted. GAWR (Gross Axle Weight Rating) The GAWR is the maximum gross axle weight rating. The actual load on an axle must never exceed the gross axle weight rating. The gross axle weight rating can be found on the

vehicle identification plate on the B-pillar on the driver's side. Speed rating The speed rating is part of the tire identification. It specifies the speed range for which the tire is approved. GTW (Gross Trailer Weight) The GTW is the weight of a trailer including the weight of the load, luggage, accessories etc. on the trailer. GVW (Gross Vehicle Weight) The gross vehicle weight includes the weight of the vehicle including fuel, tools, the spare wheel, accessories installed, occupants, luggage and the drawbar noseweight, if applicable. The gross vehicle weight must not exceed the gross vehicle weight rating GVWR as specified on the vehicle identification plate on the B-pillar on the driver's side. GVWR (Gross Vehicle Weight Rating) The GVWR is the maximum permissible gross weight of a fully loaded vehicle (the weight of the vehicle including all accessories, occupants, fuel, luggage and the drawbar noseweight, if applicable). The gross vehicle weight rating is specified on the vehicle identification plate on the B-pillar on the driver's side. Maximum loaded vehicle weight The maximum weight is the sum of: Rthe curb weight of the vehicle Rthe weight of the accessories Rthe load limit Rthe weight of the factory installed optional

equipment

Kilopascal (kPa) Metric unit for tire pressure. 6.9 kPa corresponds to 1 psi. Another unit for tire pressure is bar. There are 100 kilopascals (kPa) to 1 bar.

420 All about wheels and tires

Load index In addition to the load-bearing index, the load index may also be imprinted on the sidewall of the tire. This specifies the load-bearing capacity more precisely. Curb weight The weight of a vehicle with standard equipment including the maximum capacity of fuel, oil and coolant. It also includes the air- conditioning system and optional equipment if these are installed in the vehicle, but does not include passengers or luggage. Maximum load rating The maximum tire load is the maximum permissible weight in kilograms or lbs for which a tire is approved. Maximum permissible tire pressure Maximum permissible tire pressure for one tire. Maximum load on one tire Maximum load on one tire. This is calculated by dividing the maximum axle load of one axle by two. PSI (pounds per square inch) A standard unit of measure for tire pressure. Aspect ratio Relationship between tire height and tire width in percent. Tire pressure This is pressure inside the tire applying an outward force to each square inch of the tire's surface. The tire pressure is specified in pounds per square inch (psi), in kilopascal (kPa) or in bar. The tire pressure should only be corrected when the tires are cold.

Cold tire pressure The tires are cold: Rif the vehicle has been parked without

direct sunlight on the tires for at least three hours and

Rif the vehicle has been driven for less than

1 mile (1.6 km).

Tread The part of the tire that comes into contact with the road. Bead The tire bead ensures that the tire sits securely on the wheel. There are several steel wires in the bead to prevent the tire from coming loose from the wheel rim. Sidewall The part of the tire between the tread and the bead. Weight of optional extras The combined weight of those optional extras that weigh more than the replaced standard parts and more than 2.3 kilograms (5 lbs). These optional extras, such as high- performance brakes, level control, a roof rack or a high-performance battery, are not included in the curb weight and the weight of the accessories. TIN (Tire Identification Number) This is a unique identifier which can be used by a tire manufacturer to identify tires, for example for a product recall, and thus identify the purchasers. The TIN is made up of the manufacturer's identity code, tire size, tire type code and the manufacturing date. Load bearing index The load bearing index (also load index) is a code that contains the maximum load bearing capacity of a tire.

Traction Traction is the result of friction between the tires and the road surface. TWR (Tongue Weight Rating) The TWR specifies the maximum permissible weight that the ball coupling of the trailer tow hitch can support. Treadwear indicators Narrow bars (tread wear bars) that are distributed over the tire tread. If the tire tread is level with the bars, the wear limit of á in (1.6 mm) has been reached. Occupant distribution The distribution of occupants in a vehicle at their designated seating positions. Total load limit Rated cargo and luggage load plus 68 kilograms (150 lb) multiplied by the number of seats in the vehicle.

Changing a wheel Flat tire You can find information on what to do in the event of a flat tire in the "Breakdown assistance" section (Y page 381). Information on driving with MOExtended tires in the event of a flat tire can be found under "MOExtended tires (tires with run-flat characteristics" (Y page 382). The "Breakdown assistance" section (Y page 381) contains information and notes on how to deal with a flat tire. Information on driving with MOExtended tires in the event of a flat tire can be found under "MOExtended tires (tires with run-flat characteristics" (Y page 382). Vehicles with an emergency spare wheel: in the event of a flat tire, mount the emergency spare wheel according to the description under "Mounting a wheel" (Y page 422).

Changing a wheel

421

Rotating the wheels G WARNING Interchanging the front and rear wheels may severely impair the driving characteristics if the wheels or tires have different dimensions. The wheel brakes or suspension components may also be damaged. There is a risk of accident. Rotate front and rear wheels only if the wheels and tires are of the same dimensions.

! On vehicles equipped with a tire pressure

monitor, electronic components are located in the wheel. Tire-mounting tools should not be used near the valve. This could damage the electronic components. Only have tires changed at a qualified specialist workshop.

Always observe the instructions and safety notes in the "Mounting a wheel" section (Y page 422). The wear patterns on the front and rear tires differ, depending on the operating conditions. Rotate the wheels before a clear wear pattern has formed on the tires. Front tires typically wear more on the shoulders and the rear tires in the center. If your vehicle's tire configuration allows, you can rotate the wheels according to the intervals in the tire manufacturer's warranty book in your vehicle documents. If this is not available, the tires should then be rotated every 3000 to 6000 miles (5000 to 10,000 km), or earlier if the tire wear requires this. Do not change the direction of wheel rotation. Clean the contact surfaces of the wheel and the brake disc thoroughly every time a wheel is interchanged. Check the tire pressure and, if necessary, restart the tire pressure loss warning system or the tire pressure monitor.

422 Changing a wheel

Direction of rotation Tires with a specified direction of rotation have additional benefits, e.g. if there is a risk of hydroplaning. You will only gain these benefits if the correct direction of rotation is observed. An arrow on the sidewall of the tire indicates its correct direction of rotation.

Storing wheels Store wheels that are not being used in a cool, dry and preferably dark place. Protect the tires from oil, grease, gasoline and diesel.

Cleaning the wheels G WARNING The water jet from a circular jet nozzle (dirt blasters) can cause invisible exterior damage to the tires or chassis components. Components damaged in this way may fail unexpectedly. There is a risk of an accident. Do not use power washers with circular jet nozzles to clean the vehicle. Have damaged tires or chassis components replaced immediately.

Mounting a wheel Preparing the vehicle X Vehicle with emergency spare wheel:

when mounting the emergency spare wheel in the event of a flat tire, follow the additional notes on vehicle preparation under "Flat tire" (Y page 381).

X Park the vehicle on firm, non-slippery and

level ground.

X Vehicles with the AIRMATIC package: make sure that highway level is selected (Y page 209).

X Switch off the engine. X Vehicles without KEYLESS-GO: remove

the SmartKey from the ignition lock.

X Vehicles with KEYLESS-GO: open the

driver's door. The on-board electronics have status 0, which is the same as the SmartKey having been removed.

X Vehicles with KEYLESS-GO: remove the Start/Stop button from the ignition lock (Y page 158).

X If included in the vehicle equipment, take the tire-change tool kit out of the vehicle. X Secure the vehicle to prevent it from rolling

away.

i Apart from certain country-specific

variations, vehicles are not equipped with a tire-change tool kit. For information on which tools are required to perform a wheel change on your vehicle, consult an authorized Mercedes-Benz Center. Necessary wheel-changing tools can include, for example: RJack RWheel chock RLug wrench

Securing the vehicle to prevent it from rolling away

X Unload heavy luggage. X Apply the electric parking brake manually. X Bring the front wheels into the straight-

ahead position.

X Shift the transmission to position P.

If your vehicle is equipped with a wheel chock, it can be found in the tire-change tool kit (Y page 380). The folding wheel chock is an additional securing measure to prevent the vehicle from rolling away, for example when changing a wheel. X Fold both plates upwards :. X Fold out lower plate ;. X Guide the lugs on the lower plate fully into

the openings in base plate =.

Securing the vehicle on level ground X On level ground: place chocks or other suitable items under the front and rear of the wheel that is diagonally opposite the wheel you wish to change.

Changing a wheel

423

Raising the vehicle G WARNING If you do not position the jack correctly at the appropriate jacking point of the vehicle, the jack could tip over with the vehicle raised. There is a risk of injury. Only position the jack at the appropriate jacking point of the vehicle. The base of the jack must be positioned vertically, directly under the jacking point of the vehicle.

! AMG vehicles with "Minispare" emergency spare wheel: use the "Minispare" emergency spare wheel only on the rear axle. If you mount the "Minispare" emergency spare wheel on the front axle, this could result in damage to the brake system. If a tire on the front axle is defective, an intact wheel from the rear axle must first be replaced with the "Minispare" emergency spare wheel. The defective wheel on the front axle can then be replaced with the intact wheel from the rear axle. Make sure to note the placard on the "Minispare" emergency spare wheel. ! The jack is designed exclusively for

jacking up the vehicle at the jacking points. Otherwise, your vehicle could be damaged. The following must be observed when raising the vehicle: Rto raise the vehicle, only use the vehicle-

specific jack that has been tested and approved by Mercedes-Benz. If used incorrectly, the jack could tip over with the vehicle raised.

Securing the vehicle on slight downhill gradients X On light downhill gradients: place

chocks or other suitable items in front of the wheels of the front and rear axle.

Rthe jack is designed only to raise and hold the vehicle for a short time while a wheel is being changed. It is not suited for performing maintenance work under the vehicle.

Ravoid changing the wheel on uphill and

downhill slopes.

424 Changing a wheel

Rbefore raising the vehicle, secure it from

rolling away by applying the parking brake and inserting wheel chocks. Never disengage the parking brake while the vehicle is raised.

Rthe jack must be placed on a firm, flat and

non-slip surface. On a loose surface, a large, load-bearing underlay must be used. On a slippery surface, a non-slip underlay must be used, e.g. rubber mats.

Rdo not use wooden blocks or similar

objects as a jack underlay. Otherwise, the jack will not be able to achieve its load- bearing capacity due to the restricted height.

Rthe maximum clearance between the

underside of the tire and the ground must be 1.2 in (3 cm).

Rnever place your hands and feet under the

raised vehicle.

Rnever lie under the raised vehicle. Rnever start the engine when the vehicle is

raised.

Rnever open or close a door or the tailgate

when the vehicle is raised.

Rmake sure that no persons are present in

the vehicle when the vehicle is raised.

X Using lug wrench :, loosen the bolts on the wheel you wish to change by about one full turn. Do not unscrew the bolts completely.

The jacking points are located just behind the front wheel housings and just in front of the rear wheel housings (arrows). X Take the ratchet wrench out of the vehicle tool kit and place it on the hexagon nut of the jack so that the letters AUF are visible.

; Jacking points = Jack ? Crank X Position jack = at jacking point ;.

The alignment bolt on the jack must be inserted into the intended jacking point hole.

Changing a wheel

425

Mounting a new wheel G WARNING Oiled or greased wheel bolts or damaged wheel bolts/hub threads can cause the wheel bolts to come loose. As a result, you could lose a wheel while driving. There is a risk of accident. Never oil or grease wheel bolts. In the event of damage to the threads, contact a qualified specialist workshop immediately. Have the damaged wheel bolts or hub threads replaced/renewed. Do not continue driving. G WARNING If you tighten the wheel bolts or wheel nuts when the vehicle is raised, the jack could tip over. There is a risk of injury. Only tighten the wheel bolts or wheel nuts when the vehicle is on the ground.

! To prevent damage to the paintwork, hold the wheel securely against the wheel hub while screwing in the first wheel bolt.

Always pay attention to the instructions and safety notes in the "Changing a wheel" section (Y page 421). Only use wheel bolts that have been designed for the wheel and the vehicle. For safety reasons, Mercedes-Benz recommends that you only use wheel bolts which have been approved for Mercedes-Benz vehicles and the respective wheel. ! Always use wheel bolts ; to mount the "Minispare" emergency spare wheel. Using other wheel bolts to mount the "Minispare" emergency spare wheel could damage the brake system.

Example X Make sure the foot of the jack is directly

beneath the jacking point.

X Turn ratchet wrench ? until jack = sits completely on jacking point ; and the base of the jack lies evenly on the ground.

X Turn ratchet wrench ? until the tire is

raised a maximum of 1.2 in (3 cm) from the ground.

Removing a wheel ! Do not place wheel bolts in sand or on a

dirty surface. The bolt and wheel hub threads could otherwise be damaged when you screw them in.

X Unscrew the uppermost wheel bolt

completely.

X Screw alignment bolt : into the thread

instead of the wheel bolt.

X Unscrew the remaining wheel bolts fully. X Remove the wheel.

426 Wheel and tire combinations

: Wheel bolts for all wheels supplied by the

factory

; Wheel bolts for the "Minispare"

emergency spare wheel

X Place the ratchet wrench onto the hexagon

nut of the jack so that the letters AB are visible.

X Turn the ratchet wrench until the vehicle is once again standing firmly on the ground.

X Place the jack to one side. X Tighten the wheel bolts evenly in a crosswise pattern in the sequence indicated (: to A). The tightening torque must be 110 lb-ft (150 Nm).

X Turn the jack back to its initial position. X Stow the jack and the rest of the tire-

change tool kit in the stowage well under the cargo compartment floor again. X Check the tire pressure of the newly

installed wheel and adjust it if necessary. Observe the recommended tire pressure (Y page 402).

i Vehicles with tire pressure monitor: all wheels mounted must be equipped with functioning sensors.

Wheel and tire combinations General notes ! For safety reasons, Mercedes-Benz

recommends that you only use tires and wheels which have been approved by Mercedes-Benz specifically for your vehicle.

X Clean the wheel and wheel hub contact

surfaces.

X Slide the wheel to be mounted onto the

alignment bolt and push it on.

X Tighten the wheel bolts until they are

finger-tight.

X Unscrew the alignment bolt. X Tighten the last wheel bolt until it is finger-

tight.

Lowering the vehicle G WARNING The wheels could work loose if the wheel nuts and bolts are not tightened to the specified tightening torque. There is a risk of accident. Have the tightening torque immediately checked at a qualified specialist workshop after a wheel is changed.

These tires have been specially adapted for use with the control systems, such as ABS or ESP®, and are marked as follows: RMO = Mercedes-Benz Original RMOE = Mercedes-Benz Original Extended (tires featuring run-flat characteristics)

RMO1 = Mercedes-Benz Original (only

certain AMG tires)

Mercedes-Benz Original Extended tires may only be used on wheels that have been specifically approved by Mercedes-Benz. Only use tires, wheels or accessories tested and approved by Mercedes-Benz. Certain characteristics, e.g. handling, vehicle noise emissions or fuel consumption, may otherwise be adversely affected. In addition, when driving with a load, tire dimension variations could cause the tires to come into contact with the bodywork and axle components. This could result in damage to the tires or the vehicle. Mercedes-Benz accepts no liability for damage resulting from the use of tires, wheels or accessories other than those tested and approved. Information on tires, wheels and approved combinations can be obtained from any qualified specialist workshop.

! Retreaded tires are neither tested nor recommended by Mercedes-Benz, since previous damage cannot always be detected on retreaded tires. As a result, Mercedes-Benz cannot guarantee vehicle safety if retreaded tires are mounted. Do not mount used tires if you have no information about their previous usage.

Overview of abbreviations used in the following tire tables: RBA: both axles RFA: front axle RRA: rear axle

Wheel and tire combinations

427

The recommended pressures for various operating conditions can be found: Ron the Tire and Loading Information placard

with the recommended tire pressures on the B-pillar on the driver's side

Rin the tire pressure table on the inside of

the fuel filler flap

Observe the notes on recommended tire pressures under various operating conditions (Y page 402). Check tire pressures regularly, and only when the tires are cold. Comply with the maintenance recommendations of the tire manufacturer in the vehicle document wallet. Notes on the vehicle equipment – always equip the vehicle with: Rtires of the same size on a given axle (left/

right)

Rthe same type of tires at a given time

(summer tires, winter tires, MOExtended tires)

Vehicles with MOExtended tires are not equipped with a TIREFIT kit at the factory. It is therefore recommended that you additionally equip your vehicle with a TIREFIT kit if you mount tires that do not feature run- flat properties, e.g. winter tires. A TIREFIT kit may be obtained from a qualified specialist workshop. i Not all wheel and tire combinations are available at the factory for all countries.

i On the following pages, you can find

information on approved wheel rims and tire sizes for equipping your vehicle with winter tires. Winter tires are not available at the factory as standard equipment or optional extras. If you would like to equip your vehicle with approved winter tires, you may also, in certain circumstances, require rims of the appropriate size. The sizes of the approved winter tires may deviate from that of the standard tires. This is dependent on the model and the equipment installed at the factory.

428 Wheel and tire combinations

The tires and wheel rims, as well as further information, can be obtained at a qualified specialist workshop.

Tires ML 350 BlueEFFICIENCY All-weather tires R 18
Tires BA: 255/55 R 18 105 H M+S

R 19
Tires BA: 225/50 R 19 103 W

BA: 225/50 R 19 103 W MOExtended3

BA: 255/50 R 19 107 H XL M+S

BA: 255/50 R 19 107 H XL M+SMOExtended3

BA: 255/50 R 19 107 H XLM+S4

BA: 255/50 R 19 107 H XL M+SMOExtended3, 4

BA: 255/50 R 19 107 H XL M+S4

BA: 255/50 R 19 107 H XL M+SMOExtended3, 4

Wheel and tire combinations

429

Alloy wheels BA: 8.0 J x 18 H2
Wheel offset: 2.21 in (56 mm)

Alloy wheels BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.44 in (62 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.44 in (62 mm)

3 MOExtended tires (tires featuring run-flat characteristics) only in combination with an activated tire pressure

loss warning system or tire pressure monitor.

4 Use of snow chains not permitted. Observe the notes under "Snow chains".

430 Wheel and tire combinations

R 20
Tires BA: 265/45 R 20 108 H XL M+S4

BA: 265/45 R 20 108 H XL M+SMOExtended3, 4

Winter tires R 18
Tires BA: 255/55 R 18 105 H M+Si

R 19
Tires BA: 225/50 R 19 103 W

BA: 225/50 R 19 103 W MOExtended3

BA: 255/50 R 19 107 H XL M+Si

BA: 255/50 R 19 107 H XL M+SiMOExtended3

BA: 255/50 R 19 107 H XL M+Si4

BA: 255/50 R 19 107 H XL M+SiMOExtended3, 4

Alloy wheels BA: 9.0 J x 20 H2
Wheel offset: 2.24 in (57 mm) BA: 9.0 J x 20 H2
Wheel offset: 2.24 in (57 mm)

Alloy wheels BA: 8.0 J x 18 H2
Wheel offset: 2.21 in (56 mm)

Alloy wheels BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm)

4 Use of snow chains not permitted. Observe the notes under "Snow chains". 3 MOExtended tires (tires featuring run-flat characteristics) only in combination with an activated tire pressure

loss warning system or tire pressure monitor.

ML 350 4MATIC BlueEFFICIENCY All-weather tires R 18
Tires BA: 255/55 R 18 105 H M+S

R 19
Tires BA: 225/50 R 19 103 W

BA: 225/50 R 19 103 W MOExtended3

BA: 255/50 R 19 107 H XL M+S

BA: 255/50 R 19 107 H XL M+SMOExtended3

BA: 255/50 R 19 107 H XL M+S4

BA: 255/50 R 19 107 H XL M+SMOExtended3, 4

BA: 255/50 R 19 107 H XL M+S4

BA: 255/50 R 19 107 H XL M+SMOExtended3, 4

R 20
Tires BA: 265/45 R 20 108 H XL M+S4

BA: 265/45 R 20 108 H XL M+SMOExtended3, 4

Wheel and tire combinations

431

Alloy wheels BA: 8.0 J x 18 H2
Wheel offset: 2.21 in (56 mm)

Alloy wheels BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8,5 J x 19 H2 Wheel offset: 2,44 in (62 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.0 J x 19 H2
Wheel offset: 2.21 in (56 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.32 in (59 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.44 in (62 mm) BA: 8.5 J x 19 H2
Wheel offset: 2.44 in (62 mm)

Alloy wheels