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W204 - U0106 after glow plug module replacement

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Old Dec 19, 2022 | 12:53 PM
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W204
W204 - U0106 after glow plug module replacement

Afternoon all,

I'm hoping someone here has had a similar problem, or can help.

I've got a W204 with the V6 diesel (OM642) that has a consistent glow plug fault. I've replaced the glow plug controller but the fault persists.

I've tested the glow plugs and they all read the same. The car will not start on cold mornings unless I manually heat some of the glow plugs.
​​
​​​​​The supply cable to the controller has a constant 12v supply

Does anyone have a wiring diagram or similar so I can try to solve this issue? I can't find any blown fuses but there's always a chance I have missed some.
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