Steering wheel makes creeping noice

[Guest]

About two months ago Volvo replaced the speed-dependant-steering system (everything under the hood related to the steering) on my 6 months old XC90.

After this change the steering wheel makes a creeping noise while turning with large angles (like parking). You cant hear the noise while driving.

The car has been in the workshop 5 times now. They first didn't believe me and final put some grease, somwhere (dont know where exactly). This solved the problem for 3 days, the creeping noice is back.

I'm really mad now, this expensive car is delivered included a couple of mice installed in the steering unit.

Any experiences?

PS: It seemed that the speed-dependant-steering was already defective from day 1. It was over-powered, but as it was a new car, I really didn't know this was normal or not.