W220 Central Locking Pump - Industrial Area (Nairobi) - by TARZ

The Central Locking Pump (PSE / Pneumatic Control Unit Module A37/1) on the Mercedes-Benz S-Class (W220) is a multi-functional pneumatic system. Instead of using electrical solenoids to click the door locks open, the W220 uses a high-pressure air and vacuum pump to quietly actuate the locks, trunk pop, multi-contour dynamic seats, and the soft-close door mechanisms.If this pump drops offline, your luxury cruiser becomes highly inconvenient to access, often requiring you to use the physical metal mechanical key blade to manually turn the door barrels.