Mercedes-Benz 300 TD-TURBO DIESEL 1985 Owner's Manual page 76

Electrical System
License Plate Lamps
(5 W festoon lamp)
Loosen both the securing screw s (1)
and take out lamp.
Backup Lamps (21 W /32 cp)
Loosen securing screw s and detach
lens. To replace, depress the bulb,
turn it to the left and pull it out.
Interior Lamps
(10 W festoon lamp)
To replace the bulb, lift off front lamp
at RH side, pull it out and open
reflector.
The same applies to the removal of
the rear lamp.
Sun Visor Lamp
(5 W festoon lamp)
To replace a bulb, pry off the cover by
inserting a screw driver in the left and
right slots located on the lower edge.