Suspension Air Compressor Pump for Mercedes-Benz C216 W221 R231 CL550 CL600 CL65 AMG S350 S400 S550 S600 S63 

√ 1. Noticeably lower vehicle ride height
One of the first and most common symptoms of a problem with the air suspension compressor is a noticeably lower vehicle ride height.
If the compressor is worn or is having a problem, it may not be able to adequately inflate the air bags and the vehicle may sit and ride noticeably lower as a result.

√ 2. Compressor works erratically or not at all
Another symptom and a more serious issue is a compressor that does not come on.
Most air systems are self-regulated and turn the compressor on and off automatically. This largely depends on your system’s requirements. If your compressor won’t turn on or function like normal, it’s a sign that there’s a problem.

√ 3. Unusual sounds coming from compressor
One of the most noticeable symptoms of a potential problem with the compressor is abnormal noises during operation.

If the compressor is allowed to continuously operate with abnormal sounds, it may eventually result in damage to the compressor that will cause it to fail.