W211 Random Overheating
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
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Mercedes C320 CDi W203 Facelift
W211 Random Overheating
Good day all,
I have a 2009 W211 E320 CDi with overheating issues. This only occurs in slow traffic and I noticed the fan not switching on.
Temp goes up to 100 degrees and more sometimes.
Thermostat already replaced.
Any suggestions where I can look for fault?
Where is the coolant fan switch located on OM642 engine?
I have a 2009 W211 E320 CDi with overheating issues. This only occurs in slow traffic and I noticed the fan not switching on.
Temp goes up to 100 degrees and more sometimes.
Thermostat already replaced.
Any suggestions where I can look for fault?
Where is the coolant fan switch located on OM642 engine?
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
Mercedes C320 CDi W203 Facelift
Not yet. I spoke to an auto electrician yesterday and he was not very helpful.
Clearly out to make money from me.
I guess this would be the right way of finding the fault.
I am DIY and just thought I could fix it myself.
Clearly out to make money from me.
I guess this would be the right way of finding the fault.
I am DIY and just thought I could fix it myself.
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
Mercedes C320 CDi W203 Facelift
Had the car scanned and fault is the coolant fan switch.
He could however not tell me where to find the switch on the engine.
Anyone out there to point me in a direction where on the engine this is located?
OM642 engine.
He could however not tell me where to find the switch on the engine.
Anyone out there to point me in a direction where on the engine this is located?
OM642 engine.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
I don't think you will find switch.
Those engines have sophisticated control modules that take signal from temp sensor and process it via logic system.
My OM642 has no thermostat. It is electro-valve controlled by module.
Advanced scanner will have testing program, where you can turn the fan on and test modules.
Those engines have sophisticated control modules that take signal from temp sensor and process it via logic system.
My OM642 has no thermostat. It is electro-valve controlled by module.
Advanced scanner will have testing program, where you can turn the fan on and test modules.
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