broncc

Yesterday I noticed that the brake light on the passenger side of my facelift W211 isn't working but there is no error in the dashboard. The blinker in the passenger external mirror isn't working and there is an error message for it but nothing for the brake light. What could be the reason? Also is there a way to replace only the LED board or do I need to replace the whole tail light?

DuhStig

Perhaps, check the grounds in the trunk near the driver's side shock tower in the trunk.