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Old 02-14-2003, 04:14 AM
Johnson Chan
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Glow plug diagnositc code/light come on

Hello, this question is for my 92 300D 2.5 turbo with 320,000 miles.

Right now when i go to start the car, the glow plug light does NOT come on. AFTER i just start the car, the light will come on for 1 minute, then go off.

If i remember correctly, isnt there a fault code with this? for example, if the glow plug light "blinks" that means you have a glow plug out but if it doesnt come on its a relay?

BTW, all 5 glowplugs were replaced about 2 years ago. I cant remember when the relay was last replaced.

Thanks in advance...

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Old 02-14-2003, 09:03 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Yes, you most likely have a bad glow plug. The light comes on after starting when at least one plug is bad.
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Old 02-20-2003, 03:10 AM
Johnson Chan
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thank you MB doc. its my luck that this happens when its cold and rainy outside, lol. i guess i will have my weekend and knuckles busy.

Thanks :-)

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