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.

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F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)