Keeps your MERCEDES-BENZ running the way it should — this Aftermarket part restores the original function of a worn or failed V belt Deflection Pulley guide Pulley OE Ref 2712000570, built to OEM reference 500004 rather than a generic approximation.
Aftermarket identifies it as AMCP-31989-ME027. Match that against OEM 500004 or your old part before fitting, particularly if your vehicle's had any running changes across its production years.
Confirmed for selected MERCEDES-BENZ vehicles. Use the vehicle registration lookup tool if you're not certain, or browse Belt Drive for other options.