mercedes c320 cdi year 06.

[seanposs42]

As anyone had simular or same as. When you put air con on within 15-20 secs can here high pitch like whistling it's not permenant whistling it's on off on off so on. When you press button to turn off its doesn't go off immediately but eventually the noise stops. Anyone had Same problem ??? Or know what is the problem ?? Many thanks ahead.
Sean

 

[BlackC55]

The AC gas is low. I expect you have a leak.

 

[cws196]

First place to check is the condenser

 

[seanposs42]

The AC gas is low. I expect you have a leak.

Hi it got refilled not so long ago as it wasn't working as in getting cold.