As I´ve been having problems with the air suspension, the car is out of service while I receive the new air compressor, so I decided to take advantage and have some maintenance work done in the meanwhile (Air filtes, plugs, new PDCC and P/S reservoir, serpentine belt).

While we were there, I decided to check and drain the turbo hose to the intercooler (as per some posts that I fount in here). When checking on the intercoolers, I found that the driver's side was very dirty... apparently the oil from the Oil-separator has been getting dirt and debris for some time now, and there was a filthy mass covering the intercooler.

Guess that a new Oil-separator is in order (and a deep cleaning of the intercoolers)