Integrity

Hi, recently bought me an ITR (18,000km) and has to say that it seems to me that way, so whether the SLK 230 compressor pulls better from my parents (so from 120) I bought the ITR from the dealer EZ 01. ́98 I know, sounds suspicious Bj ́98 and only 18,000km Everything is original (also air filter). The car has now about 20,000km down. My question: Was the car not properly driven (and if, how do I find it, if it can) or has a new air filter r pure because the old (probably still the first) is completely closed? I also notice that the VTec uses only 6000 rpm and not as usual at 5400 or 5600, what can it be about? I know it’s Newbie questions and some of you just hit your hands in front of your face and think… But still would be nice if you could help me. PS: Recently I couldn’t even get rid of a T4 TDI on the highway at about 170 and full throttle, which literally stuck to my shocks tange. Something’s not right. Either something’s wrong with my ITR, or the T4 had a monster machine in it and wasn’t a TDI at all, or I’m just disturbed and have no personality that bothers me to have been half-sawed by a T4.