Ml320 Norway

Hi there, my 2 fans in front of the radiator have stopped working, when I drive it's not so much problem as alot of air is coming in and cool the radiator. Not a sollution but when I was waiting for my girl at shop(s) on iddle the motor cut. and it was hard to start again. Any ideas what the problem can be?I changed headlights a few weeks ago,can there had been a interferrence with some wires? Is the termostat easily accessable?
The headlights made a huge different by the way
Please give me some tips,it's getting hotter here in Norway now...
peace Bjørn

art_arev

The Aux fan works only when:
1. refrigerant pressure reaches over 16 bar. It switches off when pressure goes down to less then 12 bar. ( AirCon on)
2. Coolant temperature reaches 105 degrees Celsius. It switches off when temperature goes down below 94 degrees Celsius.

Maj. Dundee

First you must check fuse #44 to see if it is blown. If not check, check to see that the fan ground is intact.

https://mbworld.org/forums/5592415-post2.html

AV8R4AA

Aux fan 101.
Is there a sender that can trigger the aux fan to come on a little earlier than 105C?
I feel that if the AC is on , the aux fans should be on.
I'm a BMW guy, and that's what I'm familiar with.

Also is the sender that triggers the aux fans to come on, the same as what's
being sent to the cockpit temp gauge?

Maj. Dundee

You have to give a little more information.

Do the fans ever come on?

Does the temp. rise when the A/C is on?