A4 Cabriolet V6-3.0L (AVK) (2003)
Convertible Top Hydraulic Fluid: Service and Repair
Hydraulic system, filling and bleeding
NOTE:
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The electro-hydraulic convertible top operation involves a closed hydraulic system. Generally, filling is necessary after a loss of oil (accident,
leaks, etc.).
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Due to the lift and displacement effect of the pistons in the hydraulic cylinders, the hydraulic system must be filled when the convertible top is
stored in the compartment.
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The convertible top must be moved with electro-hydraulic operation.
CAUTION: Do not fill system above "MAX" marking as the pressure in the system can become so great that damage can result.
Filling
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Remove luggage compartment trim.
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Remove oil filler plug - arrow -.
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Fill Hydraulic Oil G 004 000 with a fill container until oil level is between "MIN" and "MAX" markings.
Bleeding
NOTE: Hydraulic system is self-bleeding. The system is bled after opening and closing the convertible top several times.
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Start the engine.
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Close and open the convertible top 4 - 5 times with electro-hydraulic operation.
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The convertible top must move smoothly and without jerking.
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Check oil level in oil reservoir - 2 - when convertible top is stored in compartment.
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Oil level must be between "MIN" and "MAX" markings.
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Top off hydraulic oil if necessary.