Description
OEM part number A0305452032, a genuine Mercedes-Benz Automatic Transmission ECU for the W220 S-Class and W203 C-Class, removed from a written-off vehicle and tested in working order before dispatch.
The TCU manages sport, economy and winter shift programmes on the automatic gearbox of the W220 S-Class and W203 C-Class, selecting upshift and downshift events appropriate to road speed, throttle demand and the active driving mode. Torque converter lockup timing is precisely controlled by this module to optimise fuel consumption, with coordination signals continuously exchanged with the engine management unit at each ratio change.
Faults caused by a failing transmission ECU across the W220 or W203 include the gearbox entering a fail-safe mode and becoming locked in a single ratio, a persistent transmission warning light on the dashboard, sluggish or delayed engagement when pulling away from a standstill, and a notable deterioration in shift smoothness that can affect all available driving modes.
This is a genuine used and tested part. OEM part number is A0305452032. Professional installation by a qualified technician is required. Transmission TCU adaptation or a basic settings reset must be performed following fitment to restore full gearbox functionality.
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/
