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7Relay Assignment, Standard Equipment
Windshield wiper motor (W) (1)
Diesel engine control unit (M) (2)
Turn signals (B) (3)Fuse and Relay Optional Equipment
The cover is located below the driver’s seat.
Remove cover:
1. Press both detent springs down and remove cover.
Install cover:
2. Position cover at bottom and engage both detent
springs.
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282 MAINTAINING YOUR VEHICLE
Fuse, Relay, and Diode Assignments – Optional Equipment
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7
NOTE: The arrangement of the fuses (1) depends on
the optional equipment installed on the vehicle. The
assignments are shown on the inside of the cover of the
fuse box.
Diodes:
No. Circuit
1. Not in use
2. Not in use
3. Not in use
4. Not in use
Fuses:
No. Rated Circuit
5. 10A Immobilizer
6. 7.5A Anti-lock brake system (ABS) Electronic
Stability program (ESP
®)*
7. 25A Anti-lock brake system (ABS) Electronic
Stability program (ESP®)*
8. 40A Not in use Electronic Stability program
(ESP®)*
9. 40A Anti-lock brake system (ABS)
10. Not in use
Relays:
No. Circuit
11. Not in use
12. Starter relay
13. Not in use
* 2500 Type Vehicles only
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284 MAINTAINING YOUR VEHICLE
BULB REPLACEMENT
Switch the lights off to prevent short circuits.
Only touch new bulbs with a clean, lint-free cloth. Do
not touch bulbs with wet or greasy fingers.
Only fit 12 volt bulbs of the same type as before and
with the correct wattage rating.Front Lamp Unit
Bulbs are changed from inside the engine
compartment.
Move the retainer bar to the side and remove the
housing cover.
WARNING!
Bulbs and bulb holders can become very hot. Al-
low the lamp to cool down before changing the
bulb.
Keep bulbs out of reach of children.
Do not use bulbs which have been dropped or
which show signs of scratches on the glass. They
could explode.
Changing an H7 bulb:
The bulb is pressurized. Always wear eye and
hand protection.
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7Turn signal lamp and sidemarker lamp,
3457 NA – 12V 28 / 7.5W, yellow glass (1)
Low beam headlamp, H7 – 12V 55W (2)
Fog lamp, H1 – 12V 55W (3)
Side and parking lamps, W5W – 12V 5W (4)
High beam headlamps, H1 – 12V 55 (5)Turn Signal Lamps and Side-Marker Lamps
1. Turn bulb holder, together with bulb,
counterclockwise and remove.
2. Remove the bulb from the bulb holder.
3. Insert a new bulb in the bulb holder.
4. Insert the bulb holder together with the bulb and
turn clockwise to the stop.
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286 MAINTAINING YOUR VEHICLE
Low Beam Headlamps
1. Unplug the cable connector from the bulb.
2. Unclip in the retaining springs. Press the retaining
springs towards the headlamps and down
(direction of arrow).3. Remove the bulb.
4. Insert the new bulb so that the retaining lugs are
fed into the recesses in the reflector section of the
bulb holder.
5. Clip in the retaining springs.
6. Press on the cable connector.
7. Secure the housing cap.
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MAINTAINING YOUR VEHICLE 287
7
Fog Lamp (Optional)
1. Remove the cable connector from the bulb holder.
2. Press both retaining springs in the direction of the
headlamps and then outward (in the direction of
the arrow).3. Remove the bulb.
4. Put in the new bulb so that the retaining lugs on the
bulb holder are inserted into the recesses in the
bulb holder reflector section.
5. Secure both retaining springs.
6. Press on the cable connector.
7. Secure the housing cap.
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288 MAINTAINING YOUR VEHICLE
Side and Parking Lamps
1. Pull out the bulb holder with the bulb.
2. Replace the bulb.
3. Insert the bulb holder.
4. Secure the housing cap.High Beam Headlamp
1. Unplug the cable connector from the bulb.
2. Press the retaining spring towards the headlamps
and outwards (direction of arrow).
3. Remove the bulb.
4. Insert the new bulb so that the retaining lugs are fed into
the recesses in the reflector section of the bulb holder.
5. Clip in the retaining springs.
6. Press on the cable connector.
7. Secure the housing cap.