Quote:
Originally Posted by cyman73
Hello all,
How to I test the glow plug relay to determine if it is bad? I don't know where it is located. Is it easy to change?
What is the part number for the glow plug relay?
Thank you very much.
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The relay is on the driver's side directly behind the windshield fluid bottle. It is a rectangular black unit (approx. 4"x2"x2") with multipin plug from the glow plug harness and a hot red lead screwed to a post. The MB Part # should be 022-545-75-32 .
I replaced the original one on mine back in Feb. just for good measure and it cost $142.00.......kept the 10 year old one for a back up.
What makes you think that yours is bad? Are you getting a CEL and code/message ? Trouble starting? Unplug the glow plug harness first from the Relay and check each glow plug with an ohm meter before you replace the relay. There are plenty of
threads on that subject.
Cheers
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FRED
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