andy T

I Just replaced the original heat-exchanger with the much larger aftermarket PLM heat exchanger on my 2002 C32 amg. Everything seems to work fine now except for the outside temperature indicator on the dashboard. it now says 185 degrees only and I don't know how to fix this problem. I kept resetting the outside temperature button back to farenheit and it only displays 185 degrees here. It never changes even when the car is running hot and only says 185 degrees. Any ideas why it is doing this? Thanks,
Andy T

firstshadow

The outside temp sensor is in the front bumper, I'd check the connections first. You may have knocked something loose while doing work in that area

WaveyKat

if its stuck at 185 that means the temp sensor is either missing or faulty.. it located near the fog light.

BF_JC230

Mine was disconnected once, that is what is "read out" - connect it back - and it worked again!

Just by the passenger side fog lamp...

Azeri

it happend to my car too, just check temp sensor connection. reconnect and it will be fine

Wells2269

Would this also cause the check engine light to come on?