Greeting to All,

My Euro 1991 SL500 has been trouble free until lately, when warmed up it has trouble accelerating. Almost like its starving for fuel or misfiring. at idle is very lumpy and like it's trying to fight to stay alive. It will stay bad but it can go back to perfect and no problem for the rest of the day until the next startup.

Strangely it's only happen when warmed up. Can it be the Lamda Sensor is about to go. ??? or any other Sensors?? If you have this experience and what you did to fixed it, your advice is very much appreciated.

Cheers