Don't get fobbed off and be prepared to get a refund and walk away if you have to.
Agree. Some cars are just never right. I talked to the manager of a Nissan dealership who had to take a Micra back because it had electronic issues that they could not get to the bottom of. Replaced every part but the fault was still there.
The problem is that it knocks your confidence in the car. That's one of the worst aspects of it.