Terrible throttle/power loss one full throttle press
 

I recently got a 2000 C230 Kompressor and the car will drive just fine, but as soon as I press the accelerator the floor to pass someone, the car doesn't even rev, just staying at the same RPM and bouncing.
I've heard that replacing the throttle position sensor can fix this issue, but I replaced that exact part and no change has happened.
Any ideas? Thanks

You might have a clogged catalytic converter or exhaust, which can be checked with a vacuum gauge, as this site shows:
https://shop.advanceautoparts.com/r/...ytic-converter
I'm not 100% positive but you should be able to check it using OBD-II. I know my 1999 C230K shows vacuum on OBD-II.
You can also check and see if the supercharger clutch is engaging. You don't have any codes showing?

Dylan Camp,
Welcome. :)
This maybe the case for your ride.
You may also wish to check if you have any oil film getting into your MAF, thru the IC line. Recently checked, a colleague's 2000 230 Kompressor having a similar issue no response when accelerating at both a standstill and rolling. First thing we checked was the air filter box and found a film of oil at the lower bottom end of the airbox. Opened the MAF hose on the intake of this from the IC and there was very oily film present. Went back to the oil separator and discovered it wasn't doing it's job. Replaced it and followed the member recommended bypass procedure (as done on mine). Cleaned up the oil film in all lines, cleaned the MAF with CRC. Acceleration is back and after 100 miles, the system is fine with never-ever any more oil film issues.
And as Dirgesan suggest, scan for saved codes (assuming you have a decent scanner). GL. :)