GlowPugs Change can be done anywhere by anyone who has ever turned a wrench before. Two tools required, 8mm combo spanner for the wire nuts and one more for the GPs (18mm on mine but i'm sure different on yours). 12mm IIRC but i'm sure someone else can chime in with that.

The GP light is NOT the end all word on GP health. Only way to know 100% is to hook 'em out of the car to 12v and watch 'em GLOW. Should be just the tip getting white hot.

Valves out of adjustment could also be a likely cause of your starting problems. Do you know or have a record of the last time this was done?? It is routine maintenance for these engines.

In your current situation with being at school, you'll probably have to have the mechanic do this job for you. Also a very easy job but it can be a little tricky for a first timer.

I used to pay my mech $90 to perform this service. about an hour of shop labor and the cost of a new valve cover gasket.

Do you have a Block Heater?? 50 degrees is well warm enough not to need it but it could help you get started easier if you are having a GP or Valve clearance issue.

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"