This is for a 124:

1. The reading lamp works on all settings, but it won't illuminate when I open the doors.

2. The center brake light doesn't come on (yes, I've changed the bulb).

Any thoughts as to how to troubleshoot these? Thanks.

__________________
14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

When you say the reading lamp, do you mean the 10W tube bulb or the small 6w (?) halogen bulb? The small halogen bulb only comes on when you select it, it doesn't come on with the door.

Does your lamp failure monitor go off when you hit the brake?

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Neither lamp comes on when the door is open.

No, the lamp failure light does not illuminate when I hit the brakes.

__________________
14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife