337 Practical hints
Replacing bulbs
Notes on bulb replacement
Use only 12 volt bulbs of the same type 
and with the specified watt rating. 
Switch lights off before changing a bulb 
to prevent short circuits. 
Always use a clean lint-free cloth when 
handling bulbs. 
Your hands should be dry and free of oil 
and grease.
If the newly installed bulb does not 
come on, visit an authorized 
Mercedes-Benz Light Truck Center.
Have the LEDs for the following lamps re-
placed by an authorized Mercedes-Benz 
Light Truck Center.
Additional turn signals in the exterior 
rear view mirrors
High mounted brake lamp
Lamps in the exterior rear view mirrors
Warning!G
Bulbs and bulb sockets can be very hot. Al-
low the lamp to cool down before changing 
a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas. 
A bulb can explode if you:
touch or move it when hot
drop the bulb
scratch the bulb
Wear eye and hand protection.
i
Have the headlamp adjustment 
checked regularly by a Mercedes-Benz 
Light Truck Center.
Do not turn the headlamp adjusting 
screws. If the adjusting screws are 
turned, the headlamp adjustment must 
be checked by a Mercedes-Benz Light 
Truck Center. 
357 Practical hints
Jump starting
The jump-start contacts are located in the 
engine compartment.
Make sure the two vehicles do not 
touch.
Turn off all electrical consumers.
Apply parking brake.
Shift gear selector lever to positionP.1Cover
2Positive (+) terminal 
3Negative (-) terminal 
Open cover1 of the positive terminal 
of both vehicles. 
Connect the positive terminal2 and 
the positive terminal of the charged 
battery with the jumper cable. Clamp 
cable to charged battery first.
Start engine of the vehicle with the 
charged battery and run at idle speed.
Connect negative terminal3 and the 
negative terminal of the charged bat-
tery with the jumper cable. Clamp ca-
ble to charged battery first.
Start the engine of the disabled 
vehicle.
Now you can again turn on the electrical 
consumers. Do not turn on the lights under 
any circumstances.
Remove the jumper cables first from 
the negative terminals on each battery 
and then from the positive terminals on 
each battery.
You can now turn on the lights.
Have the battery checked at the 
nearest authorized Mercedes-Benz 
Light Truck Center.
Warning!G
Keep flames or sparks away from battery. 
Do not smoke. 
Observe all safety instructions and precau-
tions when handling automotive batteries 
(
page 251) and (page 353).