The compressor is the heart of any air suspension system. When switching between different ride levels in the vehicle, it provides the desired and necessary pressure in the system. In the at autoteile germany range, you will find both the individual compressor (at12040):
as well as a complete air supply system (at10567):

Both options ensure flawless operation. For a timely repair, simply replacing the individual compressor may be sufficient. In our delivery package, the OEM relay (at10726) is always included:

The relay is an essential component for the compressor’s function. In order to guarantee the compressor’s function, we always supply relays from the original equipment. If the relay “sticks” or “fuses,” the compressor will run continuously and will eventually overheat.
When installing the compressor, the pressure line must be reconnected. It must not be cut with pliers or similar tools, as this can cause pinching or deformation of the pressure line. The result would be a system leak. We recommend the specially developed at autoteile germany cutter (at14132):

Its design is specifically adapted to the pressure line and it is equipped with a sharp blade. This ensures a clean cut and a leak-proof system.
When assembling the pressure line on the compressor and other components, it is very important to attach the connector pieces (at14171):

only hand-tight, not with a ring wrench or pliers. Otherwise, there is a risk of crushing the O-ring. Since the connector piece is made of metal and the thread in the compressor is made of plastic, overtightening can cause further damage by destroying the thread in the compressor, making the compressor unusable.
It works best with the at autoteile germany tool (at13378):

This allows you to attach the connector piece hand-tight and securely.