W204 Glow plug light

1993-Present: C200 CDI, C220 CDI, C270 CDI, C180, C200 Kompressor, C230 Kompressor, C220, C230, C280, C300 C350, CGI & CDI BlueEfficiency variants
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Joined: Sun 24 Jan, 2016 6:38 pm
Model you own: w204

W204 Glow plug light

Post by us6owner » Tue 26 Sep, 2017 9:15 pm

Recently my 2008 C220 cdi glow plug light has started coming on about 10 seconds after starting and remaining on for approx. one minute, glow plug or control issue? Any tips on fault finding appreciated.

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Tony From West Oz
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Posts: 3245
Joined: Mon 20 Jun, 2005 9:04 pm
Model you own: I own multiple different models
Region: Victoria
Location: Bedfordale WA

Re: W204 Glow plug light

Post by Tony From West Oz » Tue 26 Sep, 2017 11:30 pm

Glow plug lamp staying on after starting the engine means that 1 or more GP are faulty. Find GP relay, remove the big plug (it will have 4 contacts for 4 cylinder and 5 for 5 cylinder engine). Use multimeter on Ohms range and test from ground to each of the contacts in the cable connector. Most likely 1 or 2 will have a high resistance compared with the others. Identify faulty GPs from the labeling of the contact sockets on the plug housing (I need a magnifying lenz to see the numbers). Replace the faulty GPs and the GP lamp will go out on starting.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002
'86 W124 300D sold
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel
'98 W202 C250 Turbodiesel
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)
'00 Ford Courier Crew Cab 2.5TD

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