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  #1  
Old 05-06-2015, 10:06 AM
dtf dtf is offline
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Join Date: Jul 2003
Location: South East CT
Posts: 818
Another Check Engine/Glow plug light question

I did the search and read the articles - I have a check engine light and glow plug light on in the '99E300TD. The plug lights up and then goes off and comes back on with the CE light when the car starts. I could not find the answer to 2 questions I have though...

Is the '99 an ODBII and can my local garage read the codes?
Are the glow plugs still on while driving?

Thanks!
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dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (203,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles)
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (124,034 miles)
2014 E350 4Matic Wagon 48,000 miles
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  #2  
Old 05-06-2015, 10:36 AM
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Join Date: Mar 2014
Location: Philly
Posts: 417
Yes and no.

ODBII will tell you if a GP is out and some say if two are out which pair. It is just as easy to check at the GP relay and test the resistance on each GP. Relay is located on the drivers fender in front of the ABS pump. Unplug it and test; any one that is greater than .06 ohm is probably bad. Now the GP #s on the plug are really really small, but they are there.

AFAIK the GPs on the OM606 do have after glow but dont heat when driving.
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87 300TD 212K Miles
99 E300 169K Miles
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  #3  
Old 05-06-2015, 02:53 PM
dtf dtf is offline
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Join Date: Jul 2003
Location: South East CT
Posts: 818
Excellent - thanks! My 16 year old just her license yesterday and I want her to drive the rusted, dent covered '99 E300 and not my pristine '95 E300D. I'll tell her to ignore all the pretty Christmas tree lights on the instrument cluster
__________________
dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (203,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles)
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (124,034 miles)
2014 E350 4Matic Wagon 48,000 miles
Reply With Quote
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