Mercedes-Benz GLA Forum banner
1 - 2 of 2 Posts

·
Registered
Joined
·
190 Posts
Discussion Starter · #1 ·
This on a 2016 GLA250. Have you noticed the rhythmic (pump-like) noises emitted by the VAC system when the car starts? This can be heard with the full AC on, but it is also there (on a hot day) and often more pronounced when the AC is off.

The way to observe this is to start a car who sat in the sun for a couple of hours and listen to the sounds coming from the engine bay. Turn the climate control fully OFF and all goes quiet. What is going on?
 
1 - 2 of 2 Posts
Top