1995 E300D Glow plug issue.. Yes I've searched.. - Page 2 - PeachParts Mercedes-Benz Forum

stcbenz83 · #1 11-10-2011, 06:41 PM

For the past week, after getting off work until I go to bed, I've been searching online for the Glow plug issue I've been having and it seems that no one else has this issue.. One post on here was close to my problem but, the thread was never finished and no end result post.. So I'm posting and hope to get this issue resolved...

car: 1995 E300D OM606 N/A

Here is my issue. It has progressively become more sporadic but, usually on the first start in the morning I get no pre glow light on the dash.. This has happened a few times (different times of the day and usually never on the same day). However, if I turn the car off after its just started (roughly) and turn the key back to the pre-glow, I then will get the light and the car start smoothly and without hesitation.

I know from the 240 that usually a no glow light coming on ever indicates, from my experience, a bad relay but, in this case with my 95 it does come back on and work as normally the rest of the day.

In some of the post's I've read, there is mention of the water temp sending sensor being correlated with the GP/ relay unit. When I bought my car 3 weeks ago, this sensor (located across from the stop knob on the filter housing) was leaking anti-freeze. Turns out there was no washer on it... Put a crush washer on it, stopped the leak.

Also, from what i've read and experience, if I were to have a dead plug, the light would come on after I had started it, correct? wouldn't I also still get the pre-glow light even with one dead plug, just rougher starting? with This issue the light never comes on before/after start up. Only after i go to restart it do i get the NORMAL pre-glow light, light goes out, I start it and it fires up without hesitation, clatter or smoke. when I dont get the light, its rougher starting, lots of nailing and smoke out the exhaust.

with that said, I'm here scratching my head.. As of now, i'm thinking the relay is whacked out. But, having read that the temp sensor (which i've already had a problem with) is related to the GP unit, I don't want to drop $150-$200 for a GP relay and have it turn out to be the sensor which costs $35

So, anyone have Idea's?!