Notes on Automatic Rear Lid Actuation (Electrohydraulic-Fully Automatic)
51 24 ... - Notes on automatic rear lid actuation (electrohydraulic-fully automatic)
Important!
Adhere to conditions of absolute cleanliness when working on the opened hydraulic system. Even the smallest of dirt particles in the hydraulic system can cause malfunctions.
Function description and check:
- Refer to DIS (Diagnosis and Information System)
Installation location of individual components:
In luggage compartment on right side:
1 - Rear lid module Service and Repair
2 - Hydraulic unit Removing and Installing/Replacing Hydraulic Unit for Rear Lid Actuation (Electrohydraulic-Fully Automatic)
3 - Proportional valve Replacing Valve on Hydraulic Unit on (2)
4 - Angle transmitter Removing and Installing/Replacing Angle Transmitter for Rear Lid Actuation (Electrohydraulic-Fully Automatic) on right rear lid hinge
In luggage compartment on left side:
- Hydraulic cylinder Service and Repair on left rear lid hinge
Checking fluid level in hydraulic unit:
Necessary preliminary tasks:
- Remove right luggage compartment wheel arch trim
E67 only:
- Remove additional trim panel.
Test requirements:
Open rear lid (motor-driven) once and close again, this bleeds the system.
Open rear lid again (motor-driven).
Unscrew nuts (1).
Remove holder and pull out hydraulic unit (2).
Disconnect plug connections (3).
4 - Hoses
5 - Cable holder
Hold hydraulic unit with drive (1) all round vertically upwards.
When rear lid is fully opened (cylinder retracted), fluid level (2) must be in area (A) of marking (3).
Correct measurement:
Set hydraulic unit (1) down on a horizontal surface (4).
Damper (3) and valve (5) must not rest on surface.
Check distance (B) from middle of marking (2) to lower edge of hydraulic unit (1).
B = - 45±1 mm
Fluid level must be in area (A) of marking (2).
Correcting fluid level in hydraulic unit:
Electric motor must be removed from hydraulic unit to facilitate correction of fluid level.
Operation is described in:
- Correcting Correcting Fluid Level in Hydraulic Unit for Rear Lid Actuation (Electrohydraulic-Fully Automatic) fluid level in hydraulic unit for rear lid actuation (electrohydraulic-fully automatic).