Design

Design

The roof's link system

The electrically convertible hardtop has a link system to which the front (1), center (2) and rear (3) roof sections and the parcel shelf (4) are connected.
The main links arms (5) are connected to the body at the rear edge. The center roof section is fixed to the main link arms. The front roof section sits on link arms (6) that are articulated to the main link arms. The rear roof section is also fastened to link arms (7) that are articulated to the main link arms.
The movement of the center and rear roof sections is generated by the link arms being actuated by two hydraulic cylinders known as the master cylinders. The movement of the front roof section is generated by two other hydraulic cylinder, known as the front roof cylinders.
The convertible roof module (CRM) regulates roof operation. For information on sensors and the control module, see Design and Function, Convertible Roof Module (CRM).

Trunk lid

The trunk lid consists of an upper section (1) and a lower section (2), each of which is moveably secured to a hinge (7).
The trunk lid can be opened in two ways, partly like a normal trunk lid, guided by hinges (6) and partly in the opposite direction, guided by hinges (7). The latter for when the roof is opened and closed. An electric catch motor (5) locks the upper section of the trunk lid in the catches (4) when the roof is not being operated. For more information about the lock catch motor see, Design and Function, Convertible Roof Module (CRM).

Locking system

1. Catch, front roof section
2. Catch, center roof section
3. Catch, rear roof section
4. Catch, rear roof section, car body side
5. Catch, trunk lid
6. Lock pins, for open roof
1. There are two latches located under the front edge of the front roof section. When the roof is closed, the two latches (A) lock the front roof section against the windshield frame. This is done with the help of the front roof lock cylinder.
2. Two latches (B) lock the rear edge of the front roof section to the front edge of the center roof section. This is done with the help of the two roof cylinders (C).
3. Two rods (D) lock the rear edge of the center roof section to the front edge of the rear roof section. This is done with the help of the two roof cylinders (C).
4. Two catches (E) lock the rear edge of the rear roof section to the body when the roof is closed. Locking occurs via the two lock cylinders for the rear roof.
5. Two catches (F) are attached on the trunk lid's link system. These catches lock the upper section of the trunk lid in the link system, when the roof is open or closed. The lock catch motor operates these catches via cables.
6. When the roof is open (in the cargo compartment) the front section of the roof is operated through the movable mounting bracket (G). When the roof is in the correct resting position, the front roof section's lock cylinder locks the front catches (A) around the lock pins (H).

Lock, trunk lid
The trunk lid has an electric lock that locks the lid to the sill. The lock is fitted with a mechanical cable and a mechanical lock cylinder that can be used to open the trunk lid if the voltage to the lock is cut.
The lock cylinder for emergency opening of the trunk lid is placed:

Model year 2006 and early versions 2007

In the compartment between the front seats in the passenger compartment.

Later version 2007 -

On the left-hand front edge of the rear seat.
For more information about the lock, see Design and Function, Central locking.

Tonneau Cover

1. Cover panel, roof closed
2. Cover panel, roof open
3. Hydraulic cylinder
The cover panel is secured to the inside of the trunk lid. It slides forward to the rear seat backrest when the roof is open. The cover panel then closes against the trunk lid and to the backrest.
With the roof closed, the cover panel is in its drawn in position and located under the upper section of the trunk lid. When operating the roof, the cover panel is in its extended position.
The cover panel moves via a link system that is operated by two hydraulic cylinders.
The cover panel is not designed to be sat on.

Stabilizing stored roof

The cargo compartment contains several securing/stabilizing points for the stored roof:
- Four rubber spacers (1 and 2) on the floor of the cargo compartment just inside the sill.
- Two moveable clamps (3) with locking pins are housed in the plate at the backrest. The latches of the front roof section engage in the locking pins and the clamps grip the front edge of the front roof section.
- Two cradles (4), one on each side in the cargo compartment. The link system is secured in these when the roof is open.

- Two rubber pads (5) on the upper section of the trunk lid limit the movement of the upper section of the roof and prevent the roof section from colliding with various trunk lid components and the like.
- Two rubber spacers (6) on the inside of the cargo compartment to support the window.
- Two arms (7) ensure correct movement of the roof during the final phase of roof opening.
- Two rubber heels (8) prevent the rear section of the roof from colliding with the front section during large roof movements.

The hydraulic system

1. Electric motor that drives the hydraulic pump
2. Housing
3. Fluid reservoir
4. Relief valve
5. Lock for relief valve
6. Electrically operated hydraulic valve (x4)
7. Cable for release of relief valve lock
8. Hydraulic hoses
The hydraulic unit is located in the cargo compartment underneath the ski hatch. The convertible roof module (CRM) regulates the electric motor that drives the hydraulic pump clockwise or counterclockwise. The direction of rotation depends on the sequence/position of the roof during opening/closing.
The housing contains ducts through which the fluid passes to/from the hydraulic pump, to/from the four electrically controlled hydraulic valves, to/from the hydraulic cylinders and to/from the fluid reservoir.
The four hydraulic valves are integrated in the hydraulic unit and are directly connected to the convertible roof module (CRM). The various positions of the hydraulic cylinders (and thereby the positions of the roof sections) are regulated by opening/closing the valves in different patterns.
The relief valve releases pressure in the system when it is lifted. The ducts with pressure are then connected to the return ducts, whereby system pressure drops. Before the valve can be lifted, the lock (5) must first release the valve. This is done by pulling the cable. The handle of the cable is located under the rear seat cushion.

Warning! The roof should be closed when relieving fluid pressure so that the roof does not collapse.

Instructions on relieving fluid pressure are found in VIDA under Repair/General information.
The hydraulic hoses are fitted in the housing with O-rings as seals. The hoses are secured with a screw. The hoses and housing have numbering to facilitate identification.
The hydraulic unit is enclosed by a casing to reduce noise from the pump.

Hydraulic cylinders

1. Lock cylinder, front roof
2. Roof cylinder, left
3. Roof cylinder, right
4. Main cylinder, left
5. Main cylinder, right
6. Lock cylinder rear roof, left
7. Lock cylinder rear roof, right
8. Cylinder tonneau cover, left
9. Cylinder tonneau cover, right
10. Cylinder trunk lid, left
11. Cylinder trunk lid, right
12. Hydraulic pump
13. Splitter box hydraulic hoses
A = Open
B = Closed
All hydraulic cylinders are double acting cylinders with single side pistons. The piston/cylinder diameter, stroke length and mounting differ depending on task.

Roof cylinders
The two roof cylinders open/close the front roof section. In addition, the roof cylinders lock the front roof section to the center roof section and the center roof section to the rear section.
The locking sequence is carried out after the roof closes and the unlocking sequence occurs before the roof starts to open.
Locking occurs by the lugs on the hydraulic piston engaging in a cut-out on the locking mechanism plate. This causes the catches to follow the piston movement, where the front roof section locks into the center roof section. A ball joint is secured to the plate, opposite the catches. A push rod is connected to the ball joint. When the locking mechanism's plate moves, the push rod also moves (as do the catches). The push rod then engages in the lock housing for the rear roof section whereupon the center roof section is locked to the rear roof section.
The sequence is reversed when unlocking. i.e. the roof sections are first released and then the front roof sections opens.

The lock cylinders for the front roof section, lock cylinders and cylinders cover panel.
These cylinders move on bearings at both the cylinder and piston through ball joints. The design means that the load on these cylinders is relatively small.

Master cylinders
The master cylinders close/open the center roof section directly via the main link arms and the rear roof section indirectly via its link arms.
The movement and geometry of the link system when opening and closing the roof, cause the pistons to move elliptically. The master cylinders are suspended to prevent breaks and stresses.

Cylinders, trunk lid
The cylinders for the trunk lid are exposed to relatively large forces and are therefore strongly dimensioned. The cylinders move on bearings via bolts at both the piston and cylinder.

Connection of the hydraulic hoses to the pump

F1 - F4 = hydraulic valves.

Connection of the hydraulic hoses to the splitter box

Divider, cargo compartment

There is a divider (1) in the cargo compartment that can divide the cargo compartment into two sections. An upper section where the roof is stored when it is open and a lower section for storing luggage. Two gas struts (2) hold the divider in place.
The divider must be completely folded out for the roof to be opened.
There is a load assistance system for accessing the cargo compartment under the stored roof. The hydraulic system raises the stored roof slightly, which facilitates loading any loose luggage.
The switch for the load assistance system is located on the right-hand side of the trunk sill. For more information about load assistance, see Design and Function, Convertible Roof Module (CRM).

Internal roof
The headlining consists of two main sections plus flexible fabric surfaces that cover the C-post when raised. The front headlining is fixed to the front section of the roof panel with clips and plastic screws. Moveable cover panels are secured to the front headlining along the side edges with hinges (2 per side). These are operated via wires.
The rear headlining is fixed to the center section of the roof panel with clips. Moveable cover panels are secured to the rear headlining along the side edges with hinges (3 per side). These are operated via wires.
Cables run along the right and left side edges of the headlining. The cables are screwed in place at the front and rear of the link arms. The cables are also fastened with screws along the link arms. The cables pull the moveable cover panels and fabric surfaces along the C-post to the correct position when the roof is operated.
The parcel shelf is only active when the roof is folded up. It is attached to the main mechanism and is folded away when the roof is lowered.
Each roof section has separate roof headlining.
The headlinings for the front and center roof sections have moving flaps. The flaps are attached in the spring loaded hinges, these, in turn, are attached in the front and center roof sections. Between the flaps and roof headlining's middle section is an area of headlining that is elastic.
When the roof is opened the headlining is folded inwards, which provides necessary space for the movement of the link system.
The movement of the flaps is controlled by a number of wires and spring loaded hinges. The wires and the spring loaded hinges help to guide the roof headlining to the correct positions when opening/closing the roof.

Cables

The wire runs along the headlining's right and left edges. The wires pull the headlining to the correct position when the roof is closed.
The cables consist of three cable groups marked A, B and C in the illustration.
Cable A consists of cables A1, A2 and A3.
- A1. "Front headlining" runs between points 1 and 3.
- A2. "Center headlining" runs between points 2 and 5.
- A3. "Upper section of C-post" runs between points 2 and 7.
Cable B runs between the C-post bracket and the mounting of the electrically convertible hardtop, between points 8 and 12.
Cable C runs between points 9 and 11.

Points that have both a sliding knot and mounting are the same component.