Low Air Con Flow on 2006 R320CDi

[jtotheb]

I'm getting a strange issue with the air con on my 2006 R Class.

Basically, although I get cold air, the air flow is very low and only really comes out at anything approaching a decent rate when I have the temp gauges set to the blue dot below 16 degrees. The flow rate also dramatically drops when I turn on the rear vents too.

Any ideas what this could be?

Thanks in advance

 

[Benza750]

When were the last time the dust / combination filters where changed?
These can clog & reduce air flow as the air is being restricted.

 

[jtotheb]

Hmm, not sure. I had a B service about a year ago but not sure whether they were changed.