Electrical Issues - W211 2003 Merc

Hi there,
I have a 2003 w211 320 Merc. Recently, multiple electrical issues have been appearing in the cabin. Key malfunction error, oil level error (when level is fine), various displays flashing, such as thermo control, parking sensors etc.

A dealer has taken a look and all they did was reset the battery and tell me that there were multiple error codes and they don't know how to find the route cause. Was wondering if anyone has experienced similar?

Any help much appreciated.

Vehicle

jeffm3
Oct 10, 2017 @ 15:22 pm