mercedes w205, engine overheating with a / c on!
07-15-2022, 07:22 PM
#1
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mercedes w205, engine overheating with a / c on!
hello everyone, the problem is already 3 years old, the engine overheats with the a / с on, it often happens on the highway and in eco mode (but I think it doesn’t matter), it heats up absolutely randomly, usually after 3-5 miles,it happens 10-15 seconds to the red zone, also for 10-15 seconds after turning off the a / c, it comes into working condition 80-90, after turning on the air conditioner, overheating was again after 15-20 minutes.
I changed absolutely everything, the pump, the thermostat, the fan works well, I cleaned the radiator 2 times, updated the firmware, the air conditioner blows cold, so I believe that everything is fine with the compressor, today I replaced the compressor valve, there was an error on it, but it did not help, overheating after 5 km again.
computer check did not give any results
also, coolant level is ok
Mercedes Benz c300, w205, 2014-2015, 71,5k miles.
https://youtube.com/shorts/UXH42fG6rFI?feature=share
I already hate the brand "MB"
I changed absolutely everything, the pump, the thermostat, the fan works well, I cleaned the radiator 2 times, updated the firmware, the air conditioner blows cold, so I believe that everything is fine with the compressor, today I replaced the compressor valve, there was an error on it, but it did not help, overheating after 5 km again.
computer check did not give any results
also, coolant level is ok
Mercedes Benz c300, w205, 2014-2015, 71,5k miles.
https://youtube.com/shorts/UXH42fG6rFI?feature=share
I already hate the brand "MB"
Last edited by kyrylo; 07-15-2022 at 08:03 PM.
07-15-2022, 10:03 PM
#2
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2017 GLE350 4MATIC
Welcome! Sorry to hear about the overheating. Please post a photo of the C-Class.
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chassis (07-15-2022)
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kyrylo (07-15-2022)
07-21-2022, 02:47 AM
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MY'14 W212 M276 3.5NA @60kMi
bad connection!
I've read through your thread. You're saying you're overheating in red temp zone. You've replaced a comprehensive set of parts without immediate success.
>> Good chance your engine TEMP Sensor is leaking coolant in its connector.
Oxidation is creating poor contacts. Closely inspect visually + observe live data with scanner or replace
The fact you are reaching the Red Temp zone means it's NOT the A/C pressure switch.
