Rollbar Convenience Actuation

The convenience actuation feature for (extending and retracting) the rollbar is accomplished with the aid of the rollbar switch (CF, S83). Convenience actuation is also possible with the soft top closed and while driving.

The extension speed of the rollbar during convenience actuation is significantly slower than for crash deployment.

Extending rollbar
The hydraulic cylinders are pressurized on the piston (arrow D) and rod sides for extension. The spring (5) relaxes as the rollbar moves up.

The extension speed for the rollbar is controlled by a throttle in the actuator and by a damper. The extension force is the result of the spring force, hydraulic force and throttle forces.

To avoid noise (locking pawl/rack) when extending the rollbar the spring-loaded locking pawls (4) are pivoted away from the rack hydraulically on both sides.
The fully extended position is signaled by the rollbar (RB) "extended" switch (S83/6).

Retracting the rollbar.
To retract (automatic during soft top operation or with S83) the locking pawl releases the rack and the hydraulic cylinder is pressurized on the rod side (arrow E). This retracts the rollbar. During the downward motion the spring for crash deployment of the rollbar is automatically tensioned. The completely retracted position is signaled by the rollbar (RB) "retracted" switch (S83/5).

Inhibiting convenience actuation
Control of the rollbar with the aid of switch S83 is inhibited by the rollbar/soft top operation control module (N52) in the following situations:
- During automatic deployment of the rollbar
- In the event of a malfunction in switch S83
- When the voltage in the vehicle electrical network is too low
- When the motor (A7/5m1) for the rollbar/soft top operation hydraulic unit (A7/5) is overheated.
- When the soft top is in an intermediate position
- In the event of various malfunctions in N52

Convenience actuation following crash deployment
To retract the roll bar following crash deployment actuate switch S83 in any direction until the lock (7) engages audibly. The hydraulic cylinder is pressurized via the rollbar valve block (Y57) and the deployment solenoid (Y57/1) is moved up to engage with the lock (7) in order to "catch" the rollbar. The rollbar can then be retracted again.