Yes, I think I see the module you are referring to. N2/4 is located behind the cluster and is identified as "seat belt warning module". From the schematic, there is a single input from the seat belt warning module to the control module located in the overhead lamp assembly. It seems logical that N2/4 would only affect the seat belt warning lights.......

Does the "seat belt warning module" also have an effect on the dome light??????

Maybe there's more to this than I thought!

J. M. van Swaay

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1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles