Incorrect Air Delivery and/or Temperature From Climate Control System on Mercedes-Benz C280

The vacuum manifold for the climate control actuator may develop a leak, This can cause poor or no operation of the air delivery and temperature control flaps.

RepairPal Verified
Average mileage: 121,922 (60,000–175,000)
8 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2007
21 people reported this problem
7 people shared problem details
I had this problem last year. It was solved by reconnecting a vac line that was near the oil filter. The line was not immediately apparent but it drops down in the oil filter area to a connector which can inadvertently pulled loose during a filter change. When I found the line, I pulled slightly on it and it was apparent it was loose. I think I had to reconnect it from under the car. When reconnected, everything worked normally again.
Upvoted (23)Flag Inappropriate
passenger side vents suddenly start blowing cold air when heat is on. Driver side vents still blow hot air.
A/C blows fine, but blower is stuck in defrost mode, and won't blow out the regular vents.
had cracked vacuum block replaced but air only blows hot air
Poor operation of the air circulation and temperature when turn to the lowest or highest degree
STILL NOT WORKING
Air does not flow from the center vents. MB dealer said it was the air-conditioning actuator, which needs to be replaced. They said it is a $600 to $800 repair at the dealership and could be fixed for much less at an independent shop (recommended that due to the car's age and value, especially since its not a critical safety system).
Related Items:
the air conditioning blowing does not work well, the mechanic mentioned that there is a vaccum...
I just got 99 C280 Sport Package (W202), I have a problem with my Automatic Climate Control, do...
The electrical connector at the automatic transmission may leak fluid. Over time leaking fluid...
A repetitive clicking noise from behind the center area of the dash panel is usually caused by...
I have a 1996 c280, 165000 miles due for a biannual smog test. If failed the first test due to...

Related Content