1997 Mercedes SL500 R129 Fuel Pressure regulator - Testing and replacement

Are you experiencing long cranking times when starting your Mercedes Benz R129? It might just be your fuel pressure regulator! This video will walk through how to quickly and properly test the regulator as well as replace it. The symptoms I experienced before replacing this part: -Occasional misfires on either cylinder bank -Occasional lean mixture codes on either cylinder bank -Slight "stumble" at idle where the engine shakes for a split second, about every 10 seconds Bosch fuel pressure regulator part no. 0280160587