what is the problem?? it starts to vibrate only when driving it ,doesnt when not in gear.

 

what is vibrating? if it feels like the motor is vibrating, which causes basically everything else to vibrate, maybe you have a few bad motor mounts.

 

my DA had fubar'd mounts...replacing them made the vibartion go away...almost!

 

I think you have a problem with your motor mounts. My DA had some bad motor mounts and I didn't even know about it until I pulled out my motor to get my car painted. Found that my whole mount was ripped apart. I would suggest checkin your motor mounts

cheers