Withdrawal
Instruction. Be sure to disconnect the battery, as the hydraulic pump turns on even when the ignition is off and hydraulic fluid flows out of the system. Risk of damage to electronic components when disconnecting the battery. Carefully follow the process of removing the battery.
Disconnect ground cable from battery. Wash the outside of the hood and cover it with a protective cover. Unlock the service cover from the inside. Unlock the bonnet cover and pull it slightly forward. Pull on protective boot -VAS 6011- on bonnet. Remove bonnet and place on protective cover -VAS 6011-. Unplug electrical connector -arrow A-. Unscrew coolant expansion tank -arrow B- and lay to one side with coolant hoses connected.
Unfasten hose clip -upper arrow- and detach coolant drain hose from cowling grille. Remove nut -lower arrow-. Remove coolant drain hose and set aside.
Unscrew vacuum reservoir approx. 1/2 turn. The hydraulic oil level in the reservoir increases.
Remove bolt -arrow-. Pull complete pipe/hose lines -1...3- downwards out of hydraulic control unit.
Seal open pipes and fittings with clean plugs from engine plug set -VAS 6122-.
Disconnect electrical connector -1-. Release screws -2- and remove hydraulic control unit -3-.
Installation
Installation in reverse order.
Carefully! Incorrect installation of tubular-hose lines can lead to destruction of the shifter. Install pipe and hose lines -1...3- according to color coding.
Tighten screw -arrow-. Tighten receiver. Add hydraulic fluid and check its level.
Pay attention to battery installation work. Turn on the ignition (the hydraulic fluid level in the expansion tank decreases). Press the brake pedal and shift gears several times (incl. Tiptronic track).
Then bleed the entire hydraulic system. Switch off the ignition. Perform a visual inspection of the hydraulic system and check for leaks. Check hydraulic fluid level and top up. Carry out the basic setting in the mode "Vehicle self-diagnosis".
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