Car sits lower on offside.

[gmc15]

I have posted this in the general section as it might not be a specific problem to X6's.

My 2016 X6 offside is about 2-3cm lower than the nearside both front and back. I noticed it as the gap from the wheel arch to the tyre is different on both sides. When the car is started there are no error messages on the idrive. The car drives OK, but just doesn't look right. Any ideas as what the problem (if there is one) is? I drove the car for a mile or so and when it was parked up it still looked the same.
Not sure if it is the offside being low or maybe the nearside being too high.

[fergie1471]

get fatty out of the passenger side