W204 with 3 electrical issues
 

I have 2008 C350 with these symptoms: 1. Auto headlights don't work and warning message on dash board at start up. 2. The rain sensing wipers don't work, (wipers work, but not the auto rain sensing) 3. The radio does not auto dim. The display lights up, but does not auto dim. I replaced the rain sensor (in wind shield) but same results.

All related to the rain/light sensor. Recent after-market windshield?

I replaced the rain sensor last week and same situation. I did have a new windshield put in about 6 months ago from a MB dealer/repair shop.

Did the issue begin after the windshield replacement? Or a while after?

Any codes when you plug in a scanner?

The problems began about 6 months after the new windshield. And last week I replaced the new electrical sensor in the windshield, but same condition. Local auto parts didn't see any codes.