My 1991 420 SEL is in the shop and just had a 560 SEL engine installed.
The engine seems to running great but when we went to test drive the car at night we noticed that there were no headlights, taillights or reverse lights. The hazards were working. I am not sure if the lights were working before the engine swap. the mechanic has been poking around but has not been able to find the problem. Any ideas?