Sudden Acceleration

[xcarnut]

Hi all
Anyone seen this before and can shed some light would be helpful.
Got a '99 CLK320 with a sudden acceleration (similar to old Audi issue) unlike old Audi, this one doesn't take off when you put it in gear but intermittently (though fairly consistently) you are driving along and essentially car continues driving without using go pedal.
My feet were completely off the gas pedal and this one keeps accelerating. After applying brake pedal this car tries to continue to accelerate (brakes eventually win) but there is a significant lag time and you are fighting the vehicle from not wanting to stop as natural when you remove foot from gas pedal and go to brake pedal.
Now that I know this happens frequently, when I notice vehicle getting possesed I shift gear lever from "D" to "N" while driving and noticed the RPM guage revving up towards 3200 ~ 3600 before settling to idle while I am using brakes to slow down.
Anyone run into similar problem ? If yes, what was the fix? Any ideas?
Thank you -
SS