Replacing Coolant Temp Sensor on E430 - PeachParts Mercedes-Benz Forum

EricSilver · #6 05-02-2018, 08:45 PM

Quote:

Originally Posted by sixto

There’s one coolant temp sensor for everything. Is the temp gauge accurate?

Does at least the driver side fan spin freely by hand?

IIRC the ACC module triggers the fan even when ACC is off.

The fan controller is under the passenger side headlight.

Sixto
98 E320s sedan and wagon

I believe the gauge is accurate. It is behaving as it has for years, except now it reaches 100+, something it has never done before.

Both fans spin freely by hand -- turning one turns both. I also tried a climate control test I saw online -- holding both "auto" buttons down for 5+ seconds to kick on the fans but that did not work, or may not apply to my car.

Thanks for the scoop on the location of the fan control unit! An online source said it was on the left side, which to me is driver's side; but the source was obviously speaking from a mechanic's POV, where left is passenger side.

Regarding the ACC (which I assume means automatic climate control), and which may or may not be relevant, is that I threw the serpentine belt in January when the idler pulley shattered. After repairing it, and replacing the belt, the climate control EC light would not go off. Resetting the ACC, using that method where you add 16 to the number displayed next to "P2", resolved it. (When I backtracked to the previous setting the EC problem resumed. Resetting it cleared it again.)