138Vehicle care
■See the Owner's Manual for further
information.
■ Explosive gas may be present in the vicinity of the battery.
Charging the vehicle battery9 Danger
Ensure adequate ventilation when
charging the battery. There is a
risk of explosion if gases
generated during charging are
allowed to accumulate!
Jump starting 3 159.
Replacing the vehicle battery
Have the vehicle battery replaced by
a workshop.
Diesel fuel filter
Drain diesel fuel filter of residual
water at every engine oil change.
Place a container underneath the
filter housing. Loosen the knurled
screw on the lower part of the filter by approx. one turn, to drain off the
water.
The filter is drained as soon as water-
free diesel fuel emerges. Retighten
the screw.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system
bleeding
If the fuel tank has been run dry, it will
be necessary to air vent or bleed the
diesel fuel system.
Refuel then proceed as follows: ■ Switch on the ignition (key to position M) for 5 seconds at a time.
■ Switch off ignition (key to position A) for 3 seconds.
■ Repeat this process multiple times.
■ Start the engine (key to position D)
then switch off (key to position St).
If the engine fails to start, seek the
assistance of a workshop.
Starting the engine 3 111.
Vehicle care147
No.Circuit1Vehicle battery (with electronic
key system)2APC battery backup (with elec‐
tronic key system)3Passenger compartment heater4Adaptations5Adaptations6Passenger compartment heater7Additional air conditioning8Additional heating9Electric exterior mirrors, addi‐
tional adaptations10Heated exterior mirrors11Radio, multimedia, electric exte‐
rior mirrors, diagnostic socket12Multimedia, trailer hitch13Fuel injection system, courtesy
lightsNo.Circuit14Fuel injection system, tyre pres‐ sure monitoring system, elec‐
tronic key system15Hazard warning flashers, turn and lane-change signals16Central locking17Left-hand high beam, right-hand
low beam, tail lights, left-hand
daytime running light18Front fog lights, rear fog lights,
number plate lighting19Alarm, horn, automatic light
control, wiper20Instrument cluster21Light switch22Rear window wiper, windscreen
washer pump, horn23APC general battery24Reversing lights25Engine start-stop buttonNo.Circuit26Fuel injection, starter27Airbag, steering column lock28Passenger power window29Power steering30Brake lights31APC battery backup (with elec‐
tronic key system)32Service display33Cigarette lighter, power outlet34Right-hand high beam, left-
hand low beam, headlights,
right-hand daytime running light35Brake lights, ABS, immobiliser36Interior lighting, air conditioning37Starting with electronic key
system38Rear window wiper39Warning chimes
Vehicle care155
6. Screw the filler hose to the tyrevalve.
7. The switch on the compressor must be set to O.
8. Connect the electrical connection cable to the power outlet or
cigarette lighter socket.
To avoid discharging the vehicle
battery, we recommend running
the engine.9. Set the rocker switch on the compressor to I. The tyre is filled
with sealant.
10. The compressor pressure gauge briefly indicates up to 6 bar(600 kPa/87 psi). Then the
pressure starts to drop.
11. All of the sealant is pumped into the tyre. Then the tyre is inflated.12. The prescribed tyre pressureshould be obtained within
15 minutes. Tyre pressure
3 178 . When the correct pressure
is obtained, switch off the
compressor.
If the prescribed tyre pressure is
not obtained within 15 minutes,
remove the tyre repair kit. Move
the vehicle one tyre rotation
(approx. 2 metres). Reattach the
tyre repair kit and continue the
filling procedure for 15 minutes. If
the prescribed tyre pressure is still not obtained, the tyre is too badly
Vehicle care159
The spare wheel is mounted under
the rear underbody and may be
secured using a security bolt that can
only be removed using the wheel bolt sleeve supplied. Vehicle tools 3 148.9 Warning
Due to the weight of the tyre
assembly, exercise caution when
releasing the spare wheel carrier.
Do not fully remove bolt 1.
Support the spare wheel with a
suitable object to prevent the
wheel falling suddenly when
loosening the carrier bolts - risk of injury!
To release the spare wheel carrier,loosen bolt 1, ensuring it is not fully
removed. Fully remove bolt 2, then
pull the carrier to the left, until it clears bolt 1, and lower the carrier assembly.
When installing the wheel ensure that
the spare wheel carrier is correctly
positioned before tightening the bolts.
Summer and winter tyres
If you use winter tyres, the spare
wheel may still be fitted with a
summer tyre.
If you use the spare wheel when it is
fitted with a summer tyre the vehicle's driveability may be affected,
especially on slippery road surfaces.
Directional tyres
Fit directional tyres such that they roll in the direction of travel. The rolling
direction is indicated by a symbol
(e.g. an arrow) on the sidewall.
The following applies to tyres fitted
opposing the rolling direction:
■ Driveability may be affected. Have the defective tyre renewed or
repaired as soon as possible.
■ Do not drive faster than 50 mph.
■ Drive particularly carefully on wet and snow-covered road surfaces.Jump starting
Do not start with a quick charger.
A vehicle with a discharged battery
can be started using jump leads and
the vehicle battery of another vehicle.9 Warning
Be extremely careful when starting
with jump leads. Any deviation
from the following instructions can
lead to injuries or damage caused
by battery explosion or damage to the electrical systems of both
vehicles.
9 Warning
Avoid contact of the battery with
eyes, skin, fabrics and painted
surfaces. The fluid contains
sulphuric acid which can cause
injuries and damage in the event
of direct contact.
■ Never expose the battery to naked flames or sparks.
160Vehicle care
■ A discharged vehicle battery canalready freeze at a temperature of
0 °C. Defrost the frozen battery
before connecting jump leads.
■ Wear eye protection and protective
clothing when handling a battery.
■ Use a booster battery with the same voltage (12 volts). Its capacity(Ah) must not be much less than
that of the discharged battery.
■ Use jump leads with insulated terminals and a cross section of at
least 16 mm 2
(25 mm 2
for diesel
engines).
■ Do not disconnect the discharged vehicle battery from the vehicle.
■ Switch off all unnecessary electrical
consumers.
■ Do not lean over the battery during jump starting.
■ Do not allow the terminals of one lead to touch those of the other
lead.
■ The vehicles must not come into contact with each other during thejump starting process.■ Apply the parking brake, transmission in neutral.
■ Open the positive terminal protection caps of both batteries.
The battery is located in the engine
compartment.
Remove cover to access the battery.
Lead connection order:
1. Connect the red lead to the positive terminal of the booster
battery.
2. Connect the other end of the red lead to the positive terminal of the
discharged battery.
3. Connect the black lead to the negative terminal of the booster
battery.
4. Connect the other end of the black
lead to a vehicle grounding point,
such as the engine block or an
engine mounting bolt. Connect as
Vehicle care161
far away from the discharged
vehicle battery as possible,
however at least 60 cm.
Route the leads so that they cannot
catch on rotating parts in the engine
compartment.
To start the engine: 1. Start the engine of the vehicle providing the jump start.
2. After 5 minutes, start the other engine. Start attempts should be
made for no longer than
15 seconds at an interval of
1 minute.
3. Allow both engines to idle for approx. 3 minutes with the leads
connected.
4. Switch on electrical consumers (e.g. headlights, heated rear
window) of the vehicle receiving
the jump start.
5. Reverse above sequence exactly when removing leads.Towing
Towing the vehicle
Release cap by using a screwdriver.
The towing eye is stowed with the
vehicle tools 3 148.
Screw the towing eye fully into the
front towing point.
Attach a tow rope - or better still a tow
rod - to the towing eye, never to the
bumper or front suspension units.
Caution
Do not tow the vehicle from the
rear. The front towing eye must
only be used for towing and not
recovering a vehicle.
Caution
Activate the child locks in the rear
doors if the rear seats are
occupied. Child locks 3 28.
Switch on ignition to release steering
wheel lock and to permit operation of
brake lights, horn and windscreen
wipers.
Transmission in neutral.
Caution
Drive slowly. Do not drive jerkily.
Excessive tractive force can
damage the vehicle.
When the engine is not running,
considerably more force is needed to
brake and steer.
182IndexAAccessories and vehicle modifications .......................... 131
Adjustable air vents ...................106
Airbag and belt tensioners ...........81
Airbag deactivation ................55, 81
Airbag label................................... 50 Airbag system .............................. 50
Air conditioning regular operation ................................ 107
Air conditioning system ................ 98
Air intake .................................... 107
Air vents...................................... 106
Alert .............................................. 87
Antifreeze ................................... 135
Antilock brake system ................ 117
Antilock brake system (ABS) .......83
Anti-theft alarm system ................33
Anti-theft locking system .............. 31
Anti-theft security lock ..................23
Appearance care ........................162
Armrest ........................................ 43
Ashtrays ....................................... 76
Automatic anti-dazzle ..................37
Automatic fuel cut-off ..................112
Automatic light control .................91
Automatic locking ........................28
Autostop ....................................... 85
Auxiliary heater ........................... 102B
Battery, jump starting.................. 159
Belts.............................................. 47
Bonnet ....................................... 132
Brake and clutch fluid .................166
Brake assist ............................... 118
Brake fluid .................................. 136
Brakes ............................... 117, 136
Brake system ............................... 83
Breakdown.................................. 161
Bulb replacement ....................... 139
C Capacities .................................. 177
Car Pass ...................................... 19
Catalytic converter .....................115
Central locking system ................23
Centre high-mounted brake light 141
Changing tyre and wheel size ...153
Charging system .......................... 82
Child locks ................................... 28
Child restraint installation locations ................................... 58
Child restraints.............................. 56
Child restraint systems ................56
Cigarette lighter ........................... 75
Cleaning the vehicle ...................162
Climate control ............................. 15
Climate control systems ...............97
186
Trailer stability assist .................130
Trailer towing ............................. 129
Transmission ............................... 16
Tread depth ............................... 152
Trip computer .............................. 88
Trip odometer .............................. 77
Turn and lane-change signals .....93
Turn signal ................................... 81
Tyre chains ................................ 153
Tyre changing ............................. 157
Tyre designations ......................149
Tyre pressure ............................ 149
Tyre pressure monitoring system ............................... 84, 150
Tyre pressures ........................... 178
Tyre repair kit ............................. 154
Tyres .......................................... 149
Tyres and wheel size, changing. 153
U Ultrasonic parking assist............. 124
Underseat storage .......................65
Upholstery .................................. 164
Upshift .......................................... 83
Using this manual ..........................3
V Vehicle battery ........................... 137
Vehicle checks............................ 132
Vehicle data ................................ 171Vehicle data recording and
privacy ..................................... 179
Vehicle dimensions .................... 174
Vehicle Identification Number ....168
Vehicle jack ................................ 148
Vehicle messages .......................87
Vehicle security ............................ 31
Vehicle shutdown ......................112
Vehicle specific data ......................3
Vehicle storage ........................... 131
Vehicle tools ............................... 148
Vehicle unlocking ........................... 6
Vehicle weight ........................... 173
Ventilation ..................................... 97
W
Warning chimes ........................... 87
Warning lights ............................... 76
Warning messages .......................87
Warning triangle .......................... 68
Washer and wiper systems .........14
Washer fluid ............................... 136
Washing the vehicle ...................162
Welcome lighting .......................... 95
Wheel changing .........................157
Wheel cover hook .......................148
Wheel covers ............................. 153
Wheels and tyres .......................149
Wheel wrench ............................. 148
Windows ....................................... 37Windscreen................................... 37
Windscreen wiper/washer ...........72
Winter tyres ............................... 149
Wiper blade replacement ..........139