[budge96]

911cedric ,all those tech hammers and stuff are great but you need to get back to basics w/
how your car operates..
The sounds and running problems and hard starting are clear indicators as Don mentioned
likely your dual mass flywheel is seperating giving false readings and subsequent codes.
If the reference and crank sensors are not getting consistent signals off the flywheel toothed
chopper the thing will fire eratically...period.
Your really fortuneate it starts at all, likely as the engine warms and the rubber loosens it
may get worse..allthey need do is change position slightly and you get poor running ..period.
Sounds like time for a new or replacement flywheel,I would try and check allthe sensors too!
You'll get it it just needs diagnosing, Bert