P1780 (Mercedes-Benz): Modulation Pressure Switchover Valve ATCC Y34 Or Upshift… — what it means, the affected system and what to check before replacing parts.
Modulation Pressure Switchover Valve ATCC Y34 Or Upshift Delay Switchover Valve ATCC Y35. Source catalogue definition; confirm applicability using vehicle service information.
Affected system: Powertrain