Mercedes W123 Brake/Tail/Reverse/Turn Bulb Replacement

The access panel for all of these lights is on the inside of the trunk. There's one on each side. This guide will cover one side; simply repeat on the other to complete the job.

The panel is secured with two thumb screws. Remove these.

Pull the panel out and away from the back of the car, being careful not to force the bulbs out of the holes.

There are five bulbs in each tail light housing. They are as follows:

Brake light

Reverse light

Tail light

Turn signal

Side marker

To remove any of the bulbs simply turn them counter clockwise approximately a half turn and then pull them out of their socket.

Three of the bulbs are #1156

One is a #96

One is a small 4W blub

Before installing the new bulb consider cleaning the socket with a soft metal wire brush such as the brass brush shown to help remove any corrosion.

Then install the new bulb, reassemble the device, and finally, be sure to test that all of your rear lights are working before going for a drive.