I have an 08 rolls royce phantom 20k miles. To my knowledge the suspension is the same as the alpina b7? Correct me if I'm wrong.

None the less, BMW made this phantom and basically 75% of the parts are bmw.

My car drops to the floor in the front suspension/shocks after a day or 2 of sitting.

Took it a shop and they pulled these codes below. (they had no further info)

Any help is appreciated. Thanks.

5F93 (Electronic Ride Height Control) High-Pressure Drain Valve


D704 (Electronic Ride Height Control) K-CAN line Fault


5F9A (Electronic Ride Height Control) High-Pressure drain valve supply