My SRT-6 is doing the same thing but less frequently. After 20 minutes of driving it will have a dramatic loss of power that lasts for about one minute. Under harder driving or hot weather conditions it will happen a little more frequently. I got an IC Pump in the mail today from Needswings. That should fix the problem. Before ordering the IC pump, I replaced the inlet air temperature sensor and the EGR transducer valve. The inlet air temperature sensor did zero to help but it only cost $36.00 from Mercedes. I replace the EGR transducer valve because it had that error code; didn't fix the main problem but made the car run smoother - so it needed to be replaced. Good luck.