Mercedes-Benz W140 instrument cluster and control panel bulbs
What bulbs are in the W140 instrument cluster and controls?
The lights are T5 wedge-base bulbs with an original rating of 1.2 W. The cluster also has a T10 bulb that only becomes visible once the cluster is taken apart.
How is the W140 instrument cluster removed to replace the bulbs?
1. Disconnect the battery terminal. 2. Pull the cluster out evenly, without jerking, using the pull hooks pushed in at the ends. The hook can slip and break the glass. 3. Disconnect the cluster wiring. 4. Replace all the bulbs at the same time and grease the sliding surfaces when refitting.
How are the heating and air conditioning control panel lights replaced?
There are two versions of the panel that look the same. On one, the knob comes off by pulling and the wedge-base bulb is pulled out of its hole. On the other, the bulbs can only be replaced by removing the panel, and some display bulbs require soldering.
How are the bulbs of the air direction controls in the middle of the dashboard replaced?
1. Remove the sunglasses compartment in the middle by its two screws on the rear wall. 2. Remove the two screws above the vents and take the vents out. 3. The bulb holders are now visible. One bulb lights two vents.