Description
This listing is for OEM part number A0225455132, a genuine Mercedes-Benz W220 S-Class Automatic Transmission ECU, sourced from a written-off vehicle and verified as fully operational before dispatch.
This TCU governs torque converter lockup strategy across the W220 S-Class automatic gearbox, engaging and releasing the converter clutch at precisely calculated speed and load thresholds to maximise fuel efficiency and reduce heat generation. It interfaces with the ESP and traction control systems, modulating transmission behaviour during gear changes to prevent wheelspin and preserve vehicle stability under hard acceleration.
A failing transmission ECU in the W220 S-Class commonly causes jerky or lurching gear changes particularly noticeable at low vehicle speeds, the gearbox becoming fixed in a single ratio regardless of selector position, intermittent or persistent illumination of the transmission warning light, and a progressive deterioration in shift smoothness that is often most pronounced when the gearbox is cold.
This is a genuine used and tested part with OEM number A0225455132. Professional installation by a qualified technician is required. A transmission TCU adaptation or basic settings reset must be performed once the unit is installed to complete the repair correctly.
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/
