it's just the car trying to level it's self, but the compressor should be pretty much quiet in operation ,so you could have a lot of wear on it

hello everyone , i'm new to the site and i'm looking for any answers that could help resolve my discos frustrating problem pleeeease ! it's a series 2 ,x reg not sure of the exact model as it was an ex met police car but it has heated front screen,hill descent and sport mode if any of these give...