Hi All,

I have a 1996 300D with 137k miles and both my "Check Engine" and "Check Engine Electronics" lights are on the dash.

I pulled the codes and I received the following information:

P0380 - Glow Plug/Heater circuit "A"
P0120 - Throttle/Pedal position sensor/switch "A" circuit

Are these issues related to each other? Any recommendations on what I should test to identify the cause?

I would appreciate any help as this is my first W210 and it seems that it could be several things. The car drives fine and I am wondering if somethings needs to be adjusted in the throttle body.

Could you please share some tests I can conduct and provide guidance? Thanks.

Best Regards,
Louis