Csaba76

After having refilled the AC some month ago (MY2000 W220 S500), last week I found that only the front right side vents blow cold air, the right side vents blow warm air only, while now there is only warm air comes from the vents.

Today I checked some register values by pressed and held the REST button (engine off then 5 mins idle).

I bought the car ~2 years before, from that time until refilling, the AC was quite OK, even the EC LED was switched on sometimes (later more frequently as a result of less and less gas).

It is very strange to me that the AC works "fine" for 2 years then some months after the refilling there is no cold air from the vents?

Is it a leak or the compressor (or other mecha part) went wrong?

Regards,
Csaba



MY2000 W220 S500 AC registers (engine off then 5mins idle)

kraut56

I believe you need to reset the system after a refill if the pressure had been down.

Search the forums, the reset procedure via the control buttons is discussed.

Good luck!

jnash

warm drivers side air vent while the passenger side (right) is cold is a symptom of low freon.
The correct way to add freon since its a variable compressor is to empty and refill with the correct amount.
Freon pressure while engine running will vary between 11-16. Yours looks like it only 7