Page 270 of 329

267 Tires, Wheels
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Tire inflation pressure
A table (see fuel filler f lap) lists the tire inflation
pressures specified for Mercedes-Benz recommended
tires as well as for the varying operating conditions.
Important!
Tire pressure changes by approx. 1.5 psi (0.1 bar) per
18°F (10°C) of air temperature change. Keep this in
mind when checking tire pressure inside a garage –
especially in the winter.
Example:
If garage temperature = approx. +68°F (+20°C) and
ambient temperature = approx. +32°F (0°C) then the
adjusted air pressure = specified air pressure +3 psi
(+0.2 bar).Tire pressures listed for light loads are minimum values
offering high driving comfort. Increased inflation
pressures for heavy loads produce favorable handling
characteristics with lighter loads and are perfectly
permissible. The ride of the vehicle, however, will
become somewhat harder.
Tire temperature and pressure increase with the vehicle
speed. Tire pressure should therefore only be checked
and corrected on cold tires. Correct tire pressure in
warm tires only if pressure has dropped below the
pressure listed in the table and the respective operating
conditions are taken into consideration.
An underinflated tire due to a slow leak (e.g. due to a
nail in the tire) may cause damage such as tread
separation, bulging etc.. Regular tire pressure checks
(including the spare tire) at intervals of no more than
14 days are therefore essential.
Page 271 of 329

268 Battery
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
If a tire constantly loses air, it should be inspected for
damage.
The spare tire should be checked periodically for
condition and inflation. Spare tire will age and become
worn over time even if never used, and thus should be
inspected and replaced when necessary.Battery
Important!
Battery replacement information:
The maintenance-free battery is located in the trunk
under the trunk floor.
The service life of the battery is dependent on its
condition of charge. The battery should always be kept
sufficiently charged, in order to last an optimum length
of time.
Wa r n i n g !
Do not overinflate tires. Overinflating tires can
result in sudden deflation (blowout) because they
are more likely to become punctured or damaged
by road debris, potholes etc.. Follow recommended
inflation pressures.Do not overload the tires by exceeding the specified
vehicle capacity weight (as indicated by the label
on the driver’s door latch post). Overloading the
tires can overheat them, possibly causing a
blowout.
Wa r n i n g !
Failure to follow these instructions can result in
severe injury or death.Never lean over batteries while connecting, you
might get injured.Battery fluid contains sulfuric acid. Do not allow
this fluid to come in contact with eyes, skin or
cloth ing. In c ase it does, im mediately f lush affected
area with water and seek medical help if necessary.A battery will also produce hydrogen gas, which is
flammable and explosive. Keep flames or sparks
away from battery, avoid improper connection of
jumper cables, smoking etc..
Page 305 of 329
302 Technical data
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Rims – Tires
1 Also permissible 225/45 ZR 17.
2 Also permissible 245/40 ZR 17.
3
3 Must not be used with snow chains.4 Also permissible 225/45 R 17 91 W.
5 Also permissible 245/40 R 17 91 W.
3
Model CLK 430 CLK 55 AMG
Rims front axle
(AMG light alloy)
Wheel offset7
1/2 J x 17 H 2
1.46 in (37 mm)7
1/2 J x 17 H 2
1.46 in (37 mm)
Rims rear axle
(AMG light alloy)
Wheel offset8
1/2 J x 17 H 2
1.18 in (30 mm)8
1/2 J x 17 H 2
1.18 in (30 mm)
Radial-ply tires
Summer tires, front axle:
Summer tires, rear axle:225/45 R 17 91 W
1
245/40 R 17 91 W
2, 3
225/45 ZR 17
4
245/40 ZR 17
5, 3
Spare wheel
Rim (light alloy)
Wheel offset7
1/2 J x 17 H 2
1.46 in (37 mm)7
1/2 J x 17 H 2
1.46 in (37 mm)
Summer tire:
Radial-ply tires 225/45 R 17 91 W
1
225/45 R 17 91 W
1