Originally Posted by sneaks
Just had to try it. Yes, the 4 wheel drive system is disengaged. The car felt much more like my friends 328i minus the torque.
Easily spins the rear with a little left foot braking in second gear! (lotsa fun)
But the best part was the unexpected bonus when i put the fuse back in. Im not going to tell anyone yet, to avoid the placebo effect. Go try it, and i will tell you what I noticed in a couple days. Don't worry; no warning lights stay on, the wipers return to their normal operation. It was a very subtle improvement I noticed.
So get out there! If it is raining your wipers will remain on and it will be super easy to verify RWD.
I just did this for fun...5 mins...WOW
The car feels....almost slow to accelerate...I know its not, thats the nature of the RWD, I no longer feel the strong pull of the AWD (its been years since i've driven RWD)...feels so good. The rear does break loose on corners. You also loose traction control.
I still don't know why they wouldnt' make this user controllable if its just a fuse. RWD is the right way to drive.