SL 500 (230.475) V8-5.0L (113.963) (2004)
Trunk / Liftgate Hydraulic Cylinder: Customer Interest
Body - When Operating Vario Roof Trunk Lid Won't Close
Trunk lid fails to close when opening/closing the Vario roof
Topic number
LI77.37-P-048796
Version
1
Design group
77.37 Vario roof, soft top - hydraulic components
Date
02-05-2010
Validity
R230 & 171
Reason for change
Model designation extended / Supersedes DTB P-B-77.
37/21
Reason for block
Complaint:
The trunk lid closes slowly or not at all when the Vario roof is opened or closed.
Cause:
Three possible causes:
- internal leakage on hydraulic cylinder at front of Vario roof (item 6)
- internal leakage on hydraulic cylinder at trunk lid latch (item 4/5)
- internal leakage on hydraulic cylinder at trunk lid actuator (item 3)
Attachments
Remedy:
Perform hydraulics test with special tool valve block, part no. 230 589 00 91 00:
1. Expose hydraulic unit, unplug connectors, unscrew nuts.
2. Reposition hydraulic unit so that the hydraulic lines are accessible, remove cable straps (A).
3. Release left connection plate and remove hydraulic lines 90, 92, 93, 94 on hydraulic unit.
4. Remove yellow stop plugs (B) from hydraulic line on valve block special tool and and use to seal connectors of detached hydraulic lines.
5. Connect first 4 hydraulic lines (C) from special tool valve block to hydraulic unit.
6. Connect hydraulic lines 90, 92, 93, 94 to special tool valve block in ascending numerical order.
7. Return hydraulic unit to its operating position, reconnect connectors and close trunk lid.
8. Operate Vario roof in the "Open" direction until the trunk lid is opened, then release the switch.
9. Close connection for line 94 on valve block with knurled screw.
10. Operate Vario roof in the "Open" direction.