Page 168 of 302

164 Emission control
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cluster displayPractical hints Car care Index
Emission control
Certain systems of the engine serve to keep the toxic 
components of the exhaust gases within permissible 
limits required by law. 
These systems, of course, will function properly only 
when maintained strictly according to factory 
specifications. Any adjustments on the engine should, 
therefore, be carried out only by qualified Mercedes-
Benz authorized Center technicians. Engine 
adjustments should not be altered in any way. Moreover, 
the specified service jobs must be carried out regularly 
according to Mercedes-Benz servicing requirements. 
For details refer to the Service Booklet.
Wa r n i n g !
Inhalation of exhaust gas is hazardous to your 
health. All exhaust gas contains carbon monoxide, 
and inhaling it can cause unconsciousness and 
lead to death.Do not run the engine in confined areas (such as a 
garage) which are not properly ventilated. If you 
think that exhaust gas fumes are entering the 
vehicle while driving, have the cause determined 
and corrected immediately. If you must drive under 
these conditions, drive only with at least one 
window fully open. 
     
        
        Page 231 of 302

227 Tires, Wheels
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Replace rims or tires with the same designation, 
manufacturer and type as shown on the original part. 
See your authorized Mercedes-Benz Center for further 
information.
See your authorized Mercedes-Benz Center for 
information on tested and recommended rims and tires 
for summer and winter operation. They can also offer 
advice concerning tire service and purchase.Tire replacement
Front and rear tires should be replaced in sets. 
Furthermore - in the event of tire replacement - the 
spare wheel (except Sport Package version), if possible, 
should be used on the rear axle. Rims and tires must be 
of the correct size and type. For dimensions, see 
page 274.
We recommend that you break in new tires for approx. 
60 miles (100 km) at moderate speed.
It is imperative that the wheel mounting bolts be 
fastened to a tightening torque of 80 ft.lb. (110 Nm) 
whenever wheels are mounted.
For rim and tire specifications, see page 274. 
     
        
        Page 243 of 302

239 Jump starting
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cluster displayPractical hintsCar care Index Jump startingImportant!
A discharged battery can freeze at approx. +14°F
(–10°C). In that case, it must be thawed out before 
jumper cables are used. Attempting to jump start a 
frozen battery can result in it exploding, causing 
personal injury.
Jumper cable specifications:
• Minimum cable cross-section of 25 mm
2 or approx. 
2AWG
• Maximum length of 11.5 ft. (3.5 m).
If the battery is discharged, the engine should be started 
with jumper cables and the (12 V) battery of another 
vehicle.
Only use 12 V battery to jump start your vehicle. Jump 
starting with more powerful battery could damage the 
vehicle’s electrical systems, which will not be covered 
by the Mercedes-Benz Limited Warranty.
The battery is located in the trunk behind the right side 
cover panel.
Wa r n i n g !
Failure to follow these directions will cause 
damage to the electronic components, and can lead 
to a battery explosion and severe injury or death.Never lean over batteries while connecting or jump 
starting, you might get injured.Battery fluid contains sulfuric acid. Do not allow 
this fluid to come in contact with eyes, skin or 
clothing. In case it does, immediately flush affected 
area with water, and seek medical help if 
necessary.A battery will also produce hydrogen gas, which is 
flammable and very explosive. Keep flames or 
sparks away from battery, avoid improper 
connection of jumper cables, smoking etc.Read all instructions before proceeding.