W221 Suspension Module

OEM Airmatic Control ModuleThe Airmatic Suspension Control Module (frequently tagged under OE part numbers such as A2215408245) regulates the pneumatic air springs, dampening rates, and vehicle leveling.Location: Tucked away in the passenger footwell. To access it, slide the front passenger seat completely backward, pull back the floor mat and carpet, and remove three 10mm plastic nuts securing the kickplate panel.Issues & Resetting: If you suffer from uneven ride heights or fault codes after suspension work, the module can be reset or recalibrated using dedicated Mercedes diagnostic tools like DAS/Xentry. If the car sits too low and the pump fails to activate, verify the 40-amp fuse and the dedicated Airmatic compressor relay before replacing the module.