good morning car mercedes e 270 cdi year 2000 despite the fact that the workshop has recharged the climate, replaced the filter drier and flushed the system, the compressor does not start after some questions it appears that the car has never been checked since it was purchased.

This car carries the round diagnostic socket in the engine compartment.

The mechanic wants to change the climate control unit, which is plugged into the display on the dashboard and manages all functions.

I have read some information that tells me that if the car drives for a while without gas, it stores errors that do not make the compressor turn on, I buy the cable in Marelli, do the diagnosis and find several errors stored that concern the air-conditioning system I delete these

and by a miracle the compressor starts without having to replace the control unit.

Good day to all