Page 252 of 301

250Vehicle care
Temperature dependencyTyre pressure depends on the
temperature of the tyre. During
driving, tyre temperature and
pressure increase.
The tyre pressure value displayed in
the DIC shows the actual tyre
pressure. Therefore it is important to
check tyre pressure with cold tyres.
Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons, it is
recommended that the tread depth of the tyres on one axle should not vary
by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and
rear wheels periodically. Ensure that
the direction of rotation of the wheels
remains the same.
Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
Changing tyre and wheel
size
If tyres of a different size than those
fitted at the factory are used, it may be necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and make other vehicle modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced.9 Warning
Use of unsuitable tyres or wheels
may lead to accidents and will
invalidate the vehicle type
approval.
Wheel covers
Wheel covers and tyres that are
factory approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination requirements must be used.
Page 253 of 301

Vehicle care251
If the wheel covers and tyres used are
not factory approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.9 Warning
Use of unsuitable tyres or wheel
covers could lead to sudden
pressure loss and thereby
accidents.
Vehicles with steel wheels: When
using locking wheel nuts, the wheel
covers might not be attached to the
steel wheels.
Tyre chains
Tyre chains are only permitted on the
front wheels.
Always use fine mesh chains that add no more than 10 mm to the tyre tread
and the inboard sides (including chain lock).
9 Warning
Damage may lead to tyre blowout.
Tyre chains are only permitted on
tyres of size 215/60 R16 and
225/50 R17.
The use of tyre chains is not permitted on the temporary spare wheel.
Tyre repair kit
Minor damage to the tyre tread can be
repaired with the tyre repair kit.
Do not remove foreign bodies from
the tyres.
Tyre damage exceeding 4 mm or that
is at the tyre's sidewall cannot be
repaired with the tyre repair kit.9 Warning
Do not drive faster than 80 km/h.
Do not use for a lengthy period.
Steering and handling may be
affected.
If you have a flat tyre:
Apply the parking brake and engage
first gear, reverse gear or P.
Page 261 of 301

Vehicle care259
12. Close the empty spare wheelholder by turning both hexagon
bolts clockwise successively
using the wheel wrench.
13. Fit the caps above both hexagon bolts.
14. Stow wheel wrench and the jack in the stowage in front of the
tailgate.
15. Close the stowage compartment cover.
When stowing the spare wheel in the
spare wheel holder, note that the
wheel is positioned with the tyre valve
above the recess of the wheel holder.
Stowing a damaged wheel in the
load compartment The spare wheel holder is not
designed for other tyre sizes than the
spare wheel.
A damaged wheel wider than the
spare wheel must be stowed in the
load compartment and secured with a strap. Vehicle tools 3 245.
The seats of the third row must be
folded down 3 79.1. Position the wheel close to the left
sidewall of the load compartment.
2. Place the loop end of the strap through the front lashing eye on
the left side.
3. Place the hook end of the strap through the loop and pull it until
the strap is fastened securely to
the lashing eye.
4. Insert the strap through the spokes of the wheel as shown in
the illustration.
5. Mount the hook to the rear left lashing eye.
6. Tighten the strap and secure it using the buckle.
9 Danger
Always drive with folded up and
engaged rear seat backrests when stowing a damaged full size wheel
in the load compartment.
Page 296 of 301

294IndexAAccessories and vehicle modifications .......................... 221
Active Emergency Braking .........191
Active head restraints ...................37
Adaptive cruise control .......117, 180
Adaptive forward lighting ..........
................................ 117, 139, 232
AdBlue ........................ 115, 164, 269
Adjustable air vents ...................154
Airbag and belt tensioners .........112
Airbag deactivation ..............59, 112
Airbag label................................... 54 Airbag system .............................. 54
Air conditioning regular operation ................................ 156
Air conditioning system .............. 149
Air intake .................................... 156
Air vents...................................... 154
Antilock brake system ................ 171
Antilock brake system (ABS) .....114
Anti-theft alarm system ................26
Anti-theft locking system .............. 26
Appearance care ........................264
Armrest ......................................... 42
Armrest storage ........................... 69
Ashtrays ..................................... 104
Automatic anti-dazzle ..................30
Automatic light control ...............137Automatic locking ........................24
Automatic transmission .............167
Auxiliary heater ........................... 154
B
Battery discharge protection ......147
Battery voltage ........................... 127
Bicycle rack .................................. 71
BlueInjection ............................... 164
Bonnet ....................................... 223
Brake and clutch fluid .................269
Brake and clutch system ...........113
Brake assist ............................... 173
Brake fluid .................................. 226
Brakes ............................... 171, 226
Breakdown.................................. 262
Bulb replacement ....................... 230
C Capacities .................................. 285
Cargo management system ........89
Car Pass ...................................... 20
Catalytic converter .....................164
Central locking system ................22
Centre console lighting ..............146
Centre console storage ...............70
Changing tyre and wheel size ...250
Charging system ........................ 112
Child locks ................................... 24