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#1
02-12-2009, 03:13 PM
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W210 glow plug testing
Can someone remind me of the trick to test which of my glow plugs is tripping up the P0380 code and causing my check engine and glow plug light to come on? I think it's a continuity test with some relay, but I can't remember. I replaced all six plugs about 25k miles ago, and I'm pretty annoyed to see this light on the dash again this quickly. I guess I've got a weekend project coming up -- nothing is so much fun as pulling that intake manifold off...
'98 W210 Turbodiesel. Cheers, John
__________________
'98 E300TD (W210) | Sold 6/09 with 205k and counting '04 VW Touareg V10TDI 
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#2
02-12-2009, 03:23 PM
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go to DieselGiant.com and follow the test procedures for the W123. Your relay is subtly different. Testing principles are the same.
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Terry Allison N. Calif. & Boca Chica, Panama 09' E320 Bluetec 77k (USA) 09' Hyundai Santa Fe Diesel 48k (S.A.)
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#3
02-12-2009, 03:35 PM
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Thanks for the pointer, Terry -- you're always right there with an answer for me, and I appreciate it!
Cheers, John
__________________
'98 E300TD (W210) | Sold 6/09 with 205k and counting '04 VW Touareg V10TDI
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#4
02-12-2009, 04:12 PM
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John - very easy. Just unplug and test each of the six terminals at the glow plug relay using an ohm meter. Good plugs will read about 0.7 ohms. Keep in mind that the plug on the relay has the terminals numbered. You may need to look REAL closely, but the numbers are there. You might be able to change #1 plug with the manifold in place, but that's probably the only one.
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Len '59 220S Cabriolet-SOLD and living happily in Malta '83 240D 351,500 miles original owner-SOLD '88 560SL 41,000 miles - totaled and parted out https://sites.google.com/site/mercedesstuff/home '99 E300 turbo 227,500 miles '03 SLK320 40,000 miles - gave to my daughter '14 Smart electric coupe 28,500 miles '14 Smart electric cabriolet 28,500 miles '15 Smart electric coupe 28,000 miles 
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