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Om642 glow plug controller

IFFY100

Active Member
Joined
Jun 8, 2020
Messages
346
Location
SCOTLAND
Car
Cls 350 cdi 2010 grand edition
So I have a glow plug fault but pretty sure the plugs are OK as I changed them for mb original 30 k ago. The flow plug controller has a metal plate which makes me think that could be faulty and is the older variant? So with this in mind, where should I purchase the controller since mb want 250 quid!!!!
 
So I have a glow plug fault but pretty sure the plugs are OK as I changed them for mb original 30 k ago. The flow plug controller has a metal plate which makes me think that could be faulty and is the older variant? So with this in mind, where should I purchase the controller since mb want 250 quid!!!!
Take the part number and search online.
 
The factory glowplugs on my OM642 started failing at 35k miles, so it's not inconceivable that one of the ones you fitted 30k miles ago has gone. If there's no fault code for a specific plug (or plugs) then maybe it is the controller, or the 225A 'mega fuse' for the whole glowplug circuit. Obviously in either case you'd have no plugs working so the engine would be cranking longer than usual in cold weather. But do some diagnostics before starting to replace things.

When I needed a controller 18 months or so ago they weren't available from MB anyway. I managed to find a "used" one at a dealership that had ordered it in for another vehicle but never fitted it.

No idea if there are any non-MB options for the controller or fuse - somebody else may be able to advise.
 

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