Roof piston hydraulic pipe bent.Check the layout of the hydraulic pipes from the roof hydraulic unit to the pistons. Check if any of the pipes are bent, impeding flow of hydraulic fluid to the pistons.Replace the bent pipe. Restore correct hydraulic pipe layout.
Low fluid level in roof hydraulic fluid reservoir.The DTC is generated when the NCP NODE identifies an electrical or mechanical fault in the hydraulic roof actuator system. Check fluid level in the hydraulic roof pump reservoir with the roof closed (car in coupé configuration).Restore the correct fluid level in the hydraulic roof pump reservoir.
O-ring damaged on hydraulic unit.Turn the roof hydraulic unit upside down and check for fluid leakage from the pipes.Replace the O-ring and, if necessary, restore correct fluid level in the reservoir.
