A6121536679 Mercedes-Benz W209 Calculateur moteur – Pièce d'origine, d'occasion et testée

Description

Le numéro de pièce d'origine A6121536679 identifie cette pièce comme un véritable <a href="/brand/mercedes-benz“>Mercedes-Benz engine control unit for the W209 CLK-Class coupé and cabriolet, manufactured to factory standards and extracted from a written-off donor vehicle. Tested for correct operation and available as an OEM replacement for the second-generation CLK range. ¶ This ECU handles exhaust aftertreatment co-ordination and catalytic converter warm-up strategy for the W209. It activates secondary air injection at cold start, monitors rear oxygen sensor feedback for catalyst efficiency, and adjusts injection pulse width to promote rapid light-off of the three-way catalyst, ensuring emissions readiness from initial start-up. ¶ ECU faults on the W209 CLK-Class can manifest as failed MOT emissions tests, illuminated catalytic converter efficiency warning codes, poor cold-start quality, stalling in reverse gear, and occasional misfires under light acceleration at low engine speed. Secondary air pump-related fault codes are particularly common on ageing units. ¶ This tested used module was removed from a written-off CLK-Class. Verify OEM number A6121536679 against your original before purchasing. Specialist installation is required, and ECU coding or SCN adaptation will typically be necessary following fitment.