Mercedes C200 W204 Knock control Faulty

So i have this 2008 C200, that came in complaining about lack of power, car has 430k kms so decently driven, engine had a sljght tap nothing crazy understandable for its mileage.

My workplace decided overhauling it would be the course of action, all new OEM branded seals/rings/bearings... Etc

Engine went back in first start smooth as butter

But the lack of power still persisted, did leakdown, compression, boost pressure tests and all was good

Played with throttle body adaptations and no issues Did a complete TCU relearn and reset, definitely helped a decent bit as now it actually kicks down and tries to pull but feels like something super heavy is in the car

These are rhe codes coming up despite new knock sensors

P0324 knock control fault

P3551 electrical fault in knock sensor 1

P3553electrical fault in sensor 2

P3226 internal fault in control modul N3/10. (ECM)

No idea what to look for anymore