i had dobinsons in my d40 and have since installed tough dog in the car as dobinsins sagged pretty bad. i love the tough dogs as i get more clearance now. from centre of centre cap to wheel arch in the front i am getting 575mm, 20mm higher than the dobinsons. hope this answers your questions.
yeah mate had the same issue with my cd player "Err 3" i have an 08 d40 and i also took it back to nissan and got it replaced. its a common issue as it is made by clarion.