The 2015 Mercedes-Benz E-Class with Airmatic suspension provides adjustable comfort and handling, but when the system displays fault warnings, the luxurious ride quality suffers. Understanding Airmatic components helps diagnose whether you're facing a simple leak or more complex system failure.
Airmatic System Components
Airmatic uses air springs at each corner instead of conventional coil springs. A compressor generates pressurized air stored in a reservoir. The valve block distributes air to individual corners based on control module commands. Height sensors monitor ride position, and the system adjusts automatically for load and driver-selected mode.
Common Airmatic Fault Causes
Air spring failures from rubber deterioration cause leaks, often starting at the crimped fittings. The compressor may wear from overwork compensating for system leaks. The valve block can develop internal leaks or electronic faults. Height sensor failures cause incorrect readings and erratic system behavior. Relay or wiring issues prevent proper system operation.
Symptoms and Warning Signs
The vehicle sits low, especially after overnight parking, indicating slow air loss. One corner dropping suggests that specific air spring has failed. The compressor running excessively indicates the system is compensating for leaks. Warning messages including 'AIRMATIC Visit Workshop' indicate detected system faults.
Diagnostic and Repair Approach
Retrieve specific fault codes using Mercedes diagnostic equipment to identify the affected component. Listen for air leaks around springs and lines. Test compressor operation and output pressure. Individual air spring replacement is common and moderately expensive. Address underlying leaks before replacing the compressor, which may have been damaged by overwork.