For this process the wheels do not need to be removed, simply putting them on the corresponding lock will allow easy access.   Start by removing the 4 torx bits on the top of the bumper In each wheel arch there are 4 torx bits shown here There are approximately 6 torx bits underneath  Next (this is the hardest part) there are 2 torx bits either side, they screw in downwards so the heads are at the top. 1 is easily visible (next image) but the other is t