hi on my 2005 2.0tdi multitronic audi, when i drive sometimes all of the gears are highlighted so i cant switch them. also some times p,n,r,d and s are all highlighted whilst driving when it should only highlight d. has anyone got any ideas as to what the problem is and how big

 

Could be the transmission, or the control module. If it's the transmission, I've generally seen around $7k to replace. If it's the TCM, I think it's still over $1k. Or if you're lucky, just some weird electrical gremlin.