Mercedes-Benz 2003 M-Class Operator's Manual page 250

Practical hints
Replacing bulbs
High beam bulbs
1 High beam headlamp cover with lock-
ing tab
Switch off the lights.
Open the hood ( page 202).
Twist cover 1 counterclockwise and re-
move.
250
2 Electrical connector
Pull electrical connector 2 off.
Unclip the retainer springs and take out
the bulb.
Insert the new bulb so that the base lo-
cates in the recess on the holder.
Clip the retainer springs.
Plug the connector 2 onto the bulb.
Align headlamp cover and click into
place.
Turn signal, parking, standing and side
marker lamp bulbs
1 Bulb socket
Switch off the lights.
Open the hood ( page 202).
Twist bulb socket 1 counterclockwise
and pull out.
Push bulb into socket, turn counter-
clockwise and remove.
Insert new bulb in socket, push in and
twist clockwise.
Reinstall the bulb socket.