I have this 2005 Blaze Red Roadster that I bought 2 years ago with 34,000 miles on it and loved it. But, after hassling the car with stalling issues for about a year and taking it to a Mercedes shop who couldn't find anything wrong with it, I finally decided to replace the CPS sensor about 6 months ago. All was good until it stalled on me coming out of a drive through line last week. Thank God it did not stall while in the line. Pulled into a parking stall and waiting for about 40 minutes then it started again.

Code reader says 2 things.
P0335 (CPS sensor... AGAIN)
P0221-Throttle/Pedal Position Sensor/Switch "B" Circuit Range/Performance Problem

Anybody know what theThrottle pedal sensor is and where is it at? I will once again change out the CPS but I have no idea what or where the Throttle pedal sensor is.

After this change out..."For sale" sign going up.