The febiPLUS range specialises in offering articles to the market that are otherwise only available from Original Equipment and the vehicle manufacturer. These febiPLUS parts are often exclusive to febi in the aftermarket. 

A good example of this febi 177705, a Compressor for Air Suspension on the Mercedes-Benz CLS (219),  E-Class (211) and S-Class (220). Workshops may often assume that this component would only be available from Mercedes, however, febi can offer an alternative high quality replacement at a great value price, direct from local motor factors. 

The function of the Air Suspension Compressor is to inflate or deflate the air springs fitted to the vehicle to ensure the manufacturer’s predetermined ride height is maintained. An electric motor is connected to a piston, the resulting movement of which sucks air into the system. It is designed for short-term pressure build up and is controlled by the Air Suspension Control Unit which receives information from various sensors that measure suspension movement, pitch, roll and yaw, etc. 
 
There is a dryer/filter that removes moisture from the air within the system which is then released back into the atmosphere using the heat of the compressor. The Air Suspension Compressor can become overloaded due to the failure of other components within the system. 
 
For example, a leaking air spring will cause the compressor to run for a longer period than it was designed to as it tries to replace the lost pressure within the system; this can be seen if the vehicle is sitting lower on one corner.
 
There may be a message displayed on the instrument cluster reading  ‘air suspension, visit workshop’ with the relevant warning lamp illuminated. If this should happen the compressor and other components should be checked and replaced as required. 

This and other febiPLUS are available from febi stockists.