Mercedes-Benz W211 Airmatic compressor does not raise the car
Why does the W211 Airmatic compressor not raise the car?
The cause is often electrical: a blown fuse, a faulty relay, a loose power connector or a broken wire. Other causes are a clogged air filter, a damp dryer and a worn compressor. First check the fuse, relay and connectors, and the voltage at the compressor connector.
How is the Airmatic compressor's electrical supply checked?
Measure the voltage at the fuse, the relay and the compressor connector. The voltage must stay steady when the compressor should start. Also check whether the control unit sends a signal to the relay coil. If the compressor does not run on a direct 12 V supply, the compressor is faulty.
Why does the compressor's dryer get damp and what is done about it?
The dryer is inside the compressor and is not available separately, so servicing it requires removing the compressor. The granules get damp if the system leaks and the compressor draws in moist air. Moist air can damage the valves. The air filter and hoses should be checked at the same time.
What strains and wears the Airmatic compressor?
An air leak, because the compressor has to run too much. A clogged or rusted air filter reduces the air supply. Find the leak and check the filter, relay and connectors before replacing the compressor. Structural suspension faults belong to a workshop.