The next point is the exterior lamp bulb failure unit which is the big relay in the relay box behind the fuse box. It goes in there and comes out of there and then goes to the fusebox.
More info here:
54 Chassis Electrical, Instruments

__________________
1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out