troubleshooting e320CDI glow plug system
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Member
Joined: Apr 2007
Posts: 97
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From: Doylestown (Bucks County) PA
2015 ML250, 06 E320 CDI, 2008 GL320 (sold)
troubleshooting e320CDI glow plug system
260K trouble free miles on my e320.....last of the cast iron blocks. Got to love the simplicity vs DEF tanks and heaters. Glow plug light staying on after start up so I replaced all the glow plugs with Beru units (except #6 which I could not get out). Still hard starting on cold days....replaced the glow plug controller thinking that would be the likely culprit. That was fun replacing the controller but successfully made the switch. Still not functioning. Does this system have a fuse or circuit breaker? Assuming the single large wire in is the supply. Is that always on with the ignition switch?
Suggestions on next steps....30F this morning.
thanks for any troubleshooting tips.
Suggestions on next steps....30F this morning.
thanks for any troubleshooting tips.
Last edited by ekm; Nov 21, 2022 at 11:00 AM.
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From: V E G A S
1922 Ford Model T / no OBD
Love my DPF and DEF equipped OM651, who starts in negative temperatures on 1st turn 
Not familiar with your engine, but GP fuse usually is part of controller?
Do you have a scanner, who can test GP? If not, I would hook up small light controller to 1 of them, so you'd be able to check what is going on.
Also checking rail pressure would be advised.
Not familiar with your engine, but GP fuse usually is part of controller?
Do you have a scanner, who can test GP? If not, I would hook up small light controller to 1 of them, so you'd be able to check what is going on.
Also checking rail pressure would be advised.
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From: Austin, Texas
05/CDI, 08/957S, 07/997-4S, 16/RRS/TD6, 23/9Y0/TSH
yes, with scanner, it will tell you which glow plug is bad. Or you can check with multimeter without removing the glow plug. Good glow plug is about 1.5Ohm and bad glowplug is about >20kOhms.
Also make sure the replacement glow plug is a 5V unit. Beru p/n:0 100 266 042.
Also make sure the replacement glow plug is a 5V unit. Beru p/n:0 100 266 042.
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From: USA
2006 E320 CDI
Thread Starter
Member
Joined: Apr 2007
Posts: 97
Likes: 1
From: Doylestown (Bucks County) PA
2015 ML250, 06 E320 CDI, 2008 GL320 (sold)
Thoughts on next steps?
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2006 E320 CDI
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Joined: Aug 2003
Posts: 31
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From: Austin, Texas
05/CDI, 08/957S, 07/997-4S, 16/RRS/TD6, 23/9Y0/TSH
Thread Starter
Member
Joined: Apr 2007
Posts: 97
Likes: 1
From: Doylestown (Bucks County) PA
2015 ML250, 06 E320 CDI, 2008 GL320 (sold)
Winter is almost over....only drove it when it was above freezing. So if I connect the glow plug wiring to a multi meter, it should show voltage (5volts)?
