Cabrio GL L4-2.0L (ABA) (2001)
Convertible Top Hydraulic Fluid: Service and Repair
Hydraulic System, Filling And Bleeding
When hydraulic pump is overloaded, a thermo-fuse interrupts circuit and system is switched off up to a maximum of 35 seconds. After that, system is
functionally ready again.
Behind a rubber cover of left trim in luggage compartment, a toggle handle is installed on hydraulic unit. By turning toggle toward left, system becomes
without pressure and convertible top can be operated manually.
Filling hydraulic system
NOTE:
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Electric-/hydraulic convertible top pertains to a closed hydraulic system. As a rule, a filling is only required after opening hydraulic circuit (e.g.
after replacing parts).
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Due to lift and displacement effects of hydraulic piston rods, hydraulic oil level must only be determined when convertible top is open.
CAUTION:
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Do not fill system above "Max" marking.
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Otherwise pressure in system could grow so large that damage cannot be prevented.
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Remove CD player if installed.
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Remove screws - arrows - of left luggage compartment trim and remove trim.
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To fill, convertible top must be opened, actual oil level can only be determined when in an opened state.
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Remove oil filler plug - 1 -.
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Oil for convertible top hydraulics: G002 000.
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Top off hydraulic oil only until oil level is between "Min" and "Max" marking - 2 -.
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Use a fill container for filling hydraulic oil.
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Fill container must only be used exclusively for this purpose in order to prevent hydraulic oil impurities by other oils.
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Screw oil filler plug - 1 - tightly (5 Nm).
Bleeding hydraulic system
Hydraulic system is self-bleeding. System is bled after several operations.
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Remove oil filler plug - 1 -.
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Switch ignition on and off again, leave key inserted in ignition lock.
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Operate convertible top switch and open and close convertible top 4 to 5 times.
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system is bled automatically by opening and closing several times.