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Mercedes-Benz Air Suspension

Mercedes-Benz Air Suspension

The air suspension system also known as “Airmatic” first appeared in the 1999 Mercedes-Benz S-Class, but has expanded to other models since. These electronically controlled air suspension components typically include some form of automatic ride height control and adaptive damping system, allowing the driver to preselect from a soft comfort mode or a stiffer sport mode for a dynamic driving experience.

These systems are revolutionary, but with any new technology, the long-term durability is its Achilles heel. Failure of the Airmatic system usually begins with the soft rubber in the struts/air bags. They degrade after years of heat cycling, developing cracks in the surface and leaking air. The Airmatic compressor which controls the system is usually located near the front bumper or wheel with lines running to all four air struts of the vehicle, which can also fail, but typically outlasts the air struts.

Special tools can be used to diagnose and service Airmatic suspension systems before these failures occur. CTA #5171 Air Suspension Pressure Tester helps detect leaks and/or irregularities in pressure throughout the air suspension system by accurately displaying the air suspension pressure.

This #5171 – Mercedes-Benz Air Suspension Pressure Tester tool accurately displays the air suspension pressure during service. It helps detect leaks and/or irregularities in pressure throughout the air suspension system which is a common issue on W220 S-Class & W211 E-Class models. The gauge displays both PSI & 100XkPa. Gauge Diameter: 70mm / 2.75". OAL of hose with quick disconnect coupler fitted is: 20” (50.8cm). Mercedes Benz adapter measures: 8mm x M1.0 (Thread Pitch).


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