Any and all help will be greatly appreciated...just thinking it could be any of the following:

• Accelerator Pedal Sensor
• Throttle Control Motor
• Throttle Position Sensor
• Power Control Module

If any of these was the issue, shouldn't I get a check engine indicator?

Did some research for M-B's SLK 320 and there are reports of this being common, but can't find a definite diagnose.