W202 no power/bogging

[kraut]

- w202 2000 Kompressor
- 120k miles

Did and extensive search of threads but none cover the exact issue.

Problem - loss of power when pushing the peddle down further than 10%. Its a similar feeling to when the rev limiter kicks in = no power
- No CEL
- Just replaced Fuel filter and MAF
- Had K&N which fouled old MAF and intake with oil
- replaced with standard air filter and cleaned intake tubes

What else should I consider? Throttle actuator or O2 sensors?
02 sensors or any other sensor for that matter have never been replaced

Thanks for your help!