Procedures

54 34 ... Notes On EH Convertible Top (Z3 Roadster, M Roadster)

NOTE: All door windows must be lowered slightly.

IMPORTANT: Ensure absolute cleanliness when working on the hydraulic system while opened as even the smallest dirt particles can cause malfunctions in the hydraulic system.







Function description (open/close):
Actuation of convertible top is only possible:
- with vehicle stopped
- from ignition lock position "R" (radio setting)
- with brake pedal depressed
- with convertible top unlocked (by hand) and raised over dead center (open)
- with tonneau cover removed (close)
- while control switch in instrument panel is pressed

Emergency actuation of convertible top:
Remove luggage compartment trim on left.







Older hydraulic unit:
Open emergency valve (1) counterclockwise by a half turn (system is depressurized).
Convertible top can now be closed and opened by hand.







Newer hydraulic unit:
Open emergency valve (1) counterclockwise by a half turn (system is depressurized).
Convertible top can now be closed and opened by hand.

Checking fluid level in hydraulic unit:
- Remove luggage compartment trim on left.
- Open convertible top (motor-driven) once and close again to bleed the system
- Convertible top must be closed







Older hydraulic unit:
Fluid level must be in range of marking (1) on hydraulic unit (2).







Newer hydraulic unit:
Fluid level must be in range of marking (1) on hydraulic unit (2).

Topping up fluid in hydraulic unit:
- Remove luggage compartment trim on left.
- Open convertible top (motor-driven) once and close again to bleed the system
- Convertible top must be closed
- Open emergency valve counterclockwise by a half turn (system is depressurized).

Installation:
- Replace oil filler plug and seal
5AZ Oil filler plug to hydraulic unit 11 Nm
- Check fluid level after filling (see work step further above)







Older hydraulic unit:
- Undo oil filler plug (2). Replenish as much hydraulic fluid (sourcing reference: BMW Parts Service) until it lies in area of marking (3)
- Close emergency valve (1).







New hydraulic unit:
- Partially remove hydraulic unit
- Turn hydraulic unit so that oil filler plug (1) points upwards
- Undo oil filler plug (1).
5AZ Oil filler plug to hydraulic unit 11 Nm
- Replenish hydraulic fluid (sourcing reference: BMW Parts Service) until it lies in area of marking (2)
- Position hydraulic unit in mounting and check fluid level, install if necessary
- Close emergency valve (3).

Extended storage of hydraulic components:
If the hydraulic unit is replaced or remains removed for an extended period, the bores on the hydraulic unit and the hose connections for hydraulic cylinder must be sealed off.