Adam Auto Works

Dear All..
Required help please.

I just brought a 98 Manual e200 W210, An Auction car.
The car, haven't running for a year, and just done major service, the engine now can't revs..its something like revs limits, cut off on 1500 rpm, the engine, start, and idling fine, you able to go anywhere.. but with 20-25km/h. not more than that.
On (N) park, i try to revs, the engine will like cut of on 1500rpm.
i replace the MAF sensor, replace the Fuel pump, Fuel filter, spark plug,Ignition coil. when to Benz Workshop, check with the mechanic, and diagnose, there's no code to be appear, means fine..and yet..still can't revs..
anybody could tell me,,what should i do..

Plutoe

I would look to the pedel position sensor and or the throttle actuator as a starting point!!