drey3000

when i start the car the radiator fan kicks on high, and on the instrument cluster display it says, Coolant check level.. please help

phister

have you checked the coolant level? is the car running hot. you might need to add coolant and use the recommended MB coolant. if the coolant level is fine then check your thermostat, it might not be opening

Carsy

Windscreen washer bottle low level ?

drey3000

I checked coolant level and topped it off still need to check thermostat...

Carsy ? I also changed the windshield washer fluid sensor and topped it off..

Still having the same problem. I wonder if i have to much air in the coolant, cus my bro has a bmw and his fan once was kicking on high until he bleed the air out.. My ? is how do u bleed the air out the mb. i hope i don't need special tool..

phister

keep the cap off the coolant reservoir and let it run for awhile.

Carsy

The thermostat should fail open.

If the engine is not running hot it may be caused by faulty sensors. Check for codes .

drey3000

Yesterday i noticed that the air tempture inside was blowing warm and whould not blow hot, so that leads to one thing, the thermostat. i guess it keeps sticking or its closed like phister said.

I got a new thermostat from MB dealer, and a new temp sensor. I also borrowed a snap-on air bleeder tool for the coolant. I will be fixing it tonight, hope it works.

Ivanrad

If that doesnt work , how many miles do you have ? I replaced my waterpump with an oem part , 505 with new thermostat for an indie mechanic to do it .