Gear Shifting Problem: Mercedes-Benz E300 W212 (722.9 7G-Tronic) A Mercedes Benz E300 W212 equipped with the 722.9 (7G-Tronic) arrived with harsh/hesitant shifting under acceleration. An OE-level scan (XENTRY) showed multiple pressure-regulating valve electrical faults and two key DTCs: P2759 (TCC ...
Mercedes 7G‑Tronic (722.9) 7‑Speed Automatic: Guide, Common Faults & Maintenance Introduced in 2003, the 7G‑Tronic is Mercedes’s first 7-speed automatic gearbox (model 722.9), widely used up to 2020. Known for smooth shifts, improved efficiency, and torque converter lock‑up across all ...