Description
OEM part number A0225454432, a genuine Mercedes-Benz W220 S-Class Automatic Transmission ECU Module, removed from a written-off vehicle and confirmed in working order through testing before dispatch.
The transmission control unit monitors turbine shaft speed, output shaft speed and throttle position simultaneously to determine the optimal upshift thresholds for each driving condition in the W220 S-Class. Kickdown logic is integrated into the module, delivering an immediate and pronounced downshift response when full-throttle input is detected, ensuring maximum acceleration is available across the entire speed range.
Faults associated with a failing transmission ECU in the W220 S-Class include harsh, clunking gear changes under moderate and heavy loads, delayed engagement from Park into Drive when moving off from a standstill, and the automatic gearbox entering a fail-safe or limp-home programme during normal driving that limits the vehicle to restricted gear availability.
This is a genuine used and tested unit. OEM part number is A0225454432. Professional installation by a qualified technician is required. A transmission TCU adaptation or basic settings reset is necessary after fitting to complete the repair.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
