Gents,

I have bought my C Class couple of months ago (and i am in love with it).. But wondering if you can help me in those issues ruining my mood every time I drive my drive it:

1- A/C has a squeaky sound most of the time when I brake or corner at low speed.

2- The coolant level warning light is always on although I am always checking it and didn’t find any leak or fluid level reduction.

I would be very thankful to anyone who could help me knowing the cause of those symptoms.

Regards,

 

Is this a new C Class, the AC noise might be a loose compressor and the belt is noisy or worn, do you have a water temp gauge, is the car running hot over 100C on the guage? If you don't have a gauge and the the coolant lite is on, sounds like a hot engine, better have that check ASAP, The coolant lite doesn't necessarily mean there is a leak, but could also be a hot engine condition.

 

the coolant level sensor is parallel connected with the washer fluid level sensor.

if the resistance of the washer fluid level sensor changed (defective), the control unit might interpret it as a signal for low coolant level.

if you need more info on how to check it, i'll send you.

it is a very interesting but simple design.

 

Sleepwalker - Your answer -

the coolant level sensor is parallel connected with the washer fluid level sensor.

if the resistance of the washer fluid level sensor changed (defective), the control unit might interpret it as a signal for low coolant level.

if you need more info on how to check it, i'll send you.

it is a very interesting but simple design.

I think this is what is wrong with my car. The check coolant level light is on and the washer fluid low light. The washer fluid was just filled and the coolant level is full...

Anyone that can help! Thanks! [&:]

 

Hey sleepwalker: i have this issue with my 99' S320. Could you please forward the instructions on how to check the system.

Thanks in advance

 

would you please post the instruction on here please (copy and paste on here or attach)!!! i think my car have the same problem! Thanks!

 

I purchased a used washer fluid reservoir to replace my cracked one. As soon as I turn the car on, the radiator light came on. After seeing the response you posted, I replaced the level sensing unit with the one from the old tank.

All is great thanks,
1996 c280