Hello, yesterday when i was driving to work all of my cars forward gears disappeared, i read that it's probably the b2 piston fault. I will try to take the B2 piston ou this weekend, my question is, if it's not broken then can i just change seals on the piston or should i just change the whole thing. The seal costs about 8euros and the piston is 200 so i'd be happy if wouldn't have to spend alot of money on fixing it.