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2010 c250 blue efficiency coupe with no coolant circulation…

Customer Question
2010 c250 blue efficiency coupe...
2010 c250 blue efficiency coupe with no coolant circulation pump. no heat at idle. works fine under load. fault codes in me for control unit progamming or replacement. current and stored. no faults in acc/control module. thermostat replaced and vacuum bled with airlift bleeder. fault codes and actual values test with sds. software issue or known design flaw?
Submitted: 2 years ago.Category: Mercedes
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Answered in 33 minutes by:
2/16/2016
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,877
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
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Hello. Are you using a star diagnosis ? Did you mean that you don't have a coolant circulation pump or you have one and it's not working ? Also there is no design flaw or known issues so we will need to diagnose this.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Also may I have your vin to check the option codes to make sure I look at the correct wiring diagram ?

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MB Paul
MB Paul, Mercedes Technician
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