If it is like the E, you can raise and lower the car.
Not sure if you have modes of suspension but in an E55, you can toggle through Comfort, Sport I and Sport II.
It is not on hydraulics so give it time to adjust!
Make sure it sits level regardless (when on a flat surface) and give it a spirited drive to ensure no errors show up.
On the E, you can also see from the rear underneath - the two reservoirs and you are checking they are not badly corroded.
Other than giving it a full test on Star, by taking it to an inde, not sure what else you could check.
If you are based near a good inde - would be worth getting it inspected.