Interior illumination on switches etc
 

The illumination on all my interior switches went out on my 400E just yesterday after I removed the ATA (factory-Alarm) control unit. Could this be related?
The dash illumination works fine, its just the rest of all the switches and controls that are no longer illuminated when I turn on the headlights.
I can't seem to find which fuse is assigned to this function or is there a relay that controls the illumination on all the switches and controls? Any help would be greatly appreciated.
Thanks,
F.J.

There is a fuse on the back of the instrument cluster. It looks like a twist in bulb but it is red in color. There's also an amplifier for the lights located on the right side of the steering column behind the instrument cluster.

Thanks, I 'll take a look at it next chance I get and will post how things went.
Thanks again,
F.J.

Hi Stan,
I finally managed to order the part from MB and get it done. All fixed now. It was exactely as you said. Thanks a lot!
Sincerely,
F.J.