Remove/Install Valve Blocks

Removal and Installation of Valve Blocks

Preliminary jobs:
Remove coupe roof (operating instructions).
Remove baggage shelf. Service and Repair
Remove coverings in rear.
Remove occasional (rear) seats. [1][2]Procedures
Observe safety regulations. Technician Safety Information


A. Roll bar valve block (A57)





Plug connectors (a, b) disconnect
Hydraulic lines (c, d, e, f, g, h) remove on valve block

NOTE: Hydraulic line no. 101 (d) is under pressure. When the hydraulic line is disconnected cover connection with rag. Screw plugs onto hydraulic lines and into connections on valve block immediately.

Special tool





Hydraulic line c:
Plug no. 129 589 00 91 08
Plug no. 129 589 00 91 09

Hydraulic lines d, e, f, g, h:
Plug no. 129 589 00 91 07
Plug no. 129 589 00 91 11

Removal, Installation






NOTE: To remove hydraulic lines press cable duct away slightly (spreading rivet removed).






1. Screw down nuts (arrows).
2. Install in opposite order.
3. Check for proper function and leakage.

B. Valve block, left (Y56)






C. Valve block, right (Y55)






Plug connector (a) disconnect
Hydraulic lines remove on valve block

NOTE: The hydraulic lines and connections on the valve block must be plugged immediately with the appropriate plugs

B Valve block, left (Y56)
Plug no. 129 589 00 91 08
Plug no. 129 589 00 91 11
Plug no. 129 589 00 91 09

B Valve block, right (Y55)
Plug no. 129 589 00 91 06
Plug no. 129 589 00 91 08
Plug no. 129 589 00 91 11
Plug no. 129 589 00 91 09
Plug no. 129 589 00 91 10

Removal, Installation

1. Screw off center catch, mark position with felt tip pen, (do not disconnect hydraulic lines). Service and Repair




Center catch, left

2. Cut lining in top compartment in area of retainer nut with knife (arrow, right). After removal glue lining back on.
3. Press center catch away slightly and screw off nuts (arrow, left).
4. Install in opposite order.
5. Check for proper function and leakage.