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174 Self-help, vehicle careChanging wheels There may be a tyre repair kit instead of a
spare wheel 3178.
Make the following preparations and
observe the following information:
z Park the vehicle on a level, firm and non-
skid surface. The front wheels must be in
the straight-ahead position.
z Switch on the hazard warning flashers,
apply the hand brake, engage first gear
or reverse.
z Erect warning triangle as specified.
Warning triangle 3171.
z Remove the spare wheel 3 172.
z Never change more than one wheel at
once.
z Use the jack 3 only to change wheels. z
If the ground on which the vehicle is
standing is soft, a solid board (max. 1 cm
thick) should be placed under the jack 3.
z Block the wheel diagonally opposite the
wheel to be changed by placing wedge
blocks or equivalent in front and behind
the wheel. z
No people or animals may be in the
vehicle when it is jacked up.
z Never crawl under a jacked-up vehicle.
z Do not start the vehicle when it is raised
on the jack.
z Before screwing in the wheel bolts, clean
them and lightly coat the taper of each
wheel bolt with comm ercially available
grease.
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177
Self-help, vehicle care
Picture no: 14763s.tif
The edge of the jack base must be
planted firmly and vertically in line with
the contact point.
Raise vehicle by turning crank handle.
If this is not the case, carefully lower the
vehicle immediately and reposition the
jack.
5. Unscrew the wheel bolts.
Picture no: 11647s.tif
If the wheel bolt s have retaining
washers 3, they must not be removed.
6. Change wheel. Notes on spare wheel 3172. Notes on temporary spare wheel
3 173.
7. Screw in the wheel bolts. Push the wheel bolt wrench 3 on as far as possible and
tighten the wheel bolts slightly.
8. Lower vehicle.
9. Push the wheel bolt wrench 3 on as far
as possible and tighten crosswise.
Tightening torque is 110 Nm. 10. Before refitting the wheel trim, clean the
wheel around the retaining clips. Valve
symbol 3 on back of wheel trim must
point towards valve on wheel.
Align and refit wheel trim or wheel bolt
caps 3.
Alloy wheels 3: put hub cap on and
engage, inserting pin on rear of hub
cap into relevant hole in wheel.
Alloy wheels with anti-theft lock 3: Put
hub cap on. Insert and tighten anti-
theft lock 3.
11. Stow removed wheel, tool kit and warning triangle in the luggage
compartment 3171.
12. Check the tyre pressure of the newly mounted wheel.
13. Have the wheel bolt tightening torque (110 Nm) checked.
14. Replace the faulty tyre on the wheel that was removed.
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179
Self-help, vehicle care
Picture no: 15319t.tif
4. Screw the compressor air hose to the connection on the sealant bottle.
5. Fit the sealant bottle in the retainer on the compressor.
Set the compressor near the tyre in such
a way that the sealant bottle is upright.
6. Remove the valve cap from the defective tyre.
Picture no: 15795t.tif
7. Screw the filler hose to the tyre valve.
8. The switch on the compressor must be set to §.
9. Plug the compressor connector into the accessory socket or the cigarette lighter
socket. For accessory sockets 378.
Picture no: 15796t.tif
10. Switch on ignition.
11. Set the rocker switch on the compressor
to I. The tyre is filled with sealant.
12. While the sealant bottle drains (approx. 30 seconds) the pressure
indicator on the compressor briefly
points to 6 bar. Pressure then sinks
again.
13. All of the sealant is pumped into the tyre. Afterwards, the tyre is filled with
air.
14. The prescribed tyre pressure should be reached within 10 minutes. Tyre
pressure 3228. Switch off the
compressor when the correct pressure is
obtained.
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182 Self-help, vehicle care
Picture no: 14725s.tif
Keep spare fuses in the fuse box lid (shown
in yellow in the Fig.). Open lid 3182.
Before replacing a fuse, turn off the
respective switch and the ignition.
A blown fuse can be recognised by its
melted wire. Do not replace the fuse until
the cause of the fault has been remedied.
To help in replacing fuses, there is a special
fuse-gripping tool in the fuse box 3.
Picture no: 12892j.tif
Slot fuse-gripping tool onto fuse and
withdraw it.
Some functions are protected by several
fuses.
There may be fuses inserted with no
function.
Always use fuses with the correct current
value. This is shown on each fuse, and is
also indicated by the fuse colour and the
plug-in location in the fuse box.
Different versions of fuses are used.
Picture no: 14211s.tif
Fuses and the most important
circuits they protect Fuse box in passenger compartment
Disengage fuse box cover at bottom and
remove. No. Circuit
1 Central control unit
2 Immobiliser, hazard warning
lamps, exterior lighting
3 Headlamp washer system
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183
Self-help, vehicle care
No. Circuit4 Infotainment system, diesel engine
5 –
6 –
7 Starter, diesel engine: engine
controller
8 Horn
9 Fuel injection system, fuel pump,
stationary heater
10 Turn signal lamps
11 Infotainment system, Information
display, Infotainment system
12 Heated rear window, exterior
mirrors
13 Central locking, anti-theft alarm
system
14 Engine control
Petrol engine:
Diesel engine:
15 Engine control unit,
Z 17 DTH engine
16 Accessory socket, cigarette lighter No. Circuit
17 –
18 Adaptive Forward Lighting
19 Central locking system
20 Interior lighting, reading lamp
21 Windscreen washer system
22 Rear electric window
23 Tilt/slide sun roof, skylight roof
24 Anti-theft alarm system
25 Rear window wiper
26 Ignition system, engine electronics
27 Engine control, airbag, ESP®
Plus
28 Air conditioning system
29 Front left electric window
30 –
31 Engine control,
Z 17 DTH engine
32 Front right electric window No. Circuit
33 Central control module,
immobiliser, control indicators
34 Windscreen wipers
35 Interior lighting, interior mirror,
information display
36 Brake light, ABS, ESP®
Plus
37Cigarette lighter, auxiliary heater
38 Seat heater (left)
39 Seat heater (right)
40 Adaptive Forward Lighting,
automatic headlamp range
adjustment
41 Reversing lamps
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184 Self-help, vehicle care
Picture no: 14436s.tif Picture no:
No. Circuit
42 Engine cooling, lighting
43 Left parking lamp
44 Right parking lamp
45 Fog tail lamp
46 Fog lamps
47 Towing equipment, accessory
socket
48 Diesel filter heater
49 –
50 Diesel filter heater
No. Circuit
51 Left dipped beam:
Xenon headlamp
Halogen headlamp
52 Right dipped beam:
Xenon headlamp
Halogen headlamp
53 Sun roof, electric windows, radio
54 Main beam (left)
55 Main beam (right)
56 –
Picture no: 14213s.tif
Fuse box in engine compartment
The fuse box is at the front left of the
engine compartment.
Disengage cover of fuse box from lug and
lift off.
Some circuits may be protected by several
fuses.
9 Warning
Turn off engine before opening fuse
box, risk of injury.
Page 194 of 248
188 Self-help, vehicle careHalogen headlamp system
3,
Adaptive Forward Lighting (AFL)
Halogen headlamp system for dipped and
main beam in comb ination with curve
lighting and cornering light.
Picture no: 14222s.tif
Xenon headlamp systemHeadlamp system has separate bulbs for
dipped beam 1 (bottom bulbs) and main
beam 2 (top bulbs).
Dipped beam
Picture no: 14219s.tif
Main beam
1. Open bonnet and engage support.
2. Remove headlamp protective cover.
9 Warning
The xenon headlamps work with very
high electrical voltage. Do not touch.
Have bulbs changed by a workshop.
9 Warning
The xenon headlamps work with very
high electrical volt age. Do not touch.
Have bulbs changed by a workshop.
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192 Self-help, vehicle care
Picture no: 17954S.tif
3. Disengage the plug of the main bulb mounting by pressing (arrow in Fig.) and
pull from bulb mounting.
4. Disengage lug of fog tail lamp plug 3
(arrow in Fig.) and remove.
Picture no: 17955S.tif
5. Slacken both screws on the back of the
main bulb mounting. Press the catches
of the bulb mounting together and
remove the bulb mounting.
Picture no: 17956s.tif
Bulbs in main bulb carrier:
Remove bulb from holder. 1 = Turn signal lamp
2 =Brake lamp bulb
3 = Tail lamp
4 = Reversing light