Bmw x5 3.0d a couple of qustions

[andrej1979]

Hello everyone.
First off all I apologize for my english.
I have some qustions about my x5 year 2004.
1. Can a faulty rear subframe bushes cause stering wheel shakes(it shake around 60mph to 75mph but not all the time. With crise control on shakes 0.5 miles then stops for 0.3 miles then starts again...)

2. I had factory bluetooth modul installed which i replaced it with dension pro bt. It works like charm, the only think i must do, is to remove the originall instalation that i can fully operate phonebook function of dension. Must I delete bmw bluetooth functions with inpa, dis,...

Thank you all....