Ok, will check the throttle switch and the air flow meter.
Hopefully the tests are in the MB book as I have not
checked these before.
I did change the OVP relay jst a few days back as the
oen there was the OE relay.
I also had changed the MAS relay almost 2 years back as
the A/C stopped working and in this car, there is no
seperate relay for the KLIMA relay in older models.
If you have suggestions as to how to check the air
flow meter and the throttle switch, please let me know