w140 600 A/C and Ventilation Problems
 

Hello to everybody!
The info is:
We have a '94 w140 600 V12 Lorinser
The problems: the A/C compressor is not starting, the 2 front cooling fans remain turned on at all time at maximum speed.
- the problem seems to be in the climate control unit and/or in the computer

Did anyone have these problems

Sounds like you have a bad engine coolant temperature sensor. When it goes bad, then engine management system goes into a fail safe mode and assumes the temperature is too hot, which means the aux fans come on at high speed and the A/C compressor is locked out.

You can use your A/C control panel to pull real time data and fault codes too. Search this forum for "A/C codes" or something similar and you will find it.