duncanh
Senior Member
- Joined
- Mar 2, 2007
- Messages
- 390
- Reaction score
- 1
- Location
- Wiltshire
- Your Mercedes
- BMW 520d SE F10, formerly c220cdi estate (for 12.5 years and 345k miles), before that w124 and w210
My glow plug light came on this morning as usual, went off after a few seconds, but came back on after the engine started.
As I drove away, I expected it to go out a few minutes later. It stayed on until I stopped about 40 minutes later.
I restarted the car, the same happened again. I switched off and restarted again, this time it went out and stayed out.
I have always understood that a faulty plug will cause the light to stay on for up to five minutes, but it will then go out.
If this is the case, I may have an electrical problem. Glow plug relay? Where is the control unit for the glow plugs on a 2002 W203 c220 cdi?
I welcome your thoughts, Faulty glow plug or faulty electrics? I will dig out the multimeter if it happens again.
What is the expected life of a glow plug (mine have done 186,000 miles in 7 years and are original. No problems until today). Also, as the battery is original, could this be an early warning? I am aware that odd things happen when the battery gets old and worn, although I have had no other symptoms.
As I drove away, I expected it to go out a few minutes later. It stayed on until I stopped about 40 minutes later.
I restarted the car, the same happened again. I switched off and restarted again, this time it went out and stayed out.
I have always understood that a faulty plug will cause the light to stay on for up to five minutes, but it will then go out.
If this is the case, I may have an electrical problem. Glow plug relay? Where is the control unit for the glow plugs on a 2002 W203 c220 cdi?
I welcome your thoughts, Faulty glow plug or faulty electrics? I will dig out the multimeter if it happens again.
What is the expected life of a glow plug (mine have done 186,000 miles in 7 years and are original. No problems until today). Also, as the battery is original, could this be an early warning? I am aware that odd things happen when the battery gets old and worn, although I have had no other symptoms.