W202 C220 Cdi engine coolant light on

mukhtar

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Jul 20, 2013
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Birmingham, uk
Your Mercedes
C220 cdi/99/220 cdi
Hi,

I own a 1999 W202 C220 cdi. The engine coolant level light is on. i've change the engine coolant sensor and the issue is there there. The washer level sensor works since the light comes on when the washer level goes done. I have noticed that the engine fan has never come on (engine temp has been at 90-100 deg on a couple of occasions).
I looked in the wheel arch area (passenger side). When fiddling with the harness connector to fan ECU unit, i notice the light went off temporarily, only to come back on again.

Does it sound like a problem with this connector (looks fine, no corrosion or water ingress witness marks) or the ECU itself?

Any help will be appreciated.

Thanks

mukhtar
 

mattuk

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Oct 25, 2011
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London
Your Mercedes
c320/2001/3.2 v6
What is coolant level? If is low that would mean LOW coolant and coolant message on dash.
 

television

Always remembered RIP
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Daventry
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2002 SL500, 216 CL500, all fully loaded
Yes the fan ecu mounted down by the bumper can fail, and this will be your problem, it may have got water in it
 

television

Always remembered RIP
Joined
Mar 14, 2005
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Your Mercedes
2002 SL500, 216 CL500, all fully loaded
The other thing on this car is that water can get into the fuse box with 2 lids, water gets under the SAM, this and the fan ECU are the 2 known things on a 202
 

Carl@MBS

<span style="color: red;">Authorised Forum Support
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Oct 8, 2012
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164 320 AMG & 211 320CDI
If it were a w203 then the wording of the message would be different, but alas you have a w202 the suction fans do give problems so a check with some diagnostics that can actuate the fan would help


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