NOTICE On the front differential lock, a multi-plate clutch similar to the all-wheel clutch can be found.

The front differential lock is filled with high-performance oil for all-wheel drive clutches.

Special tools and workshop equipment required

• Torque wrench - VAG 1331-

• Filling device - VAS 6291A-

• Temperature measuring device - VAS 6519-

• Oil extraction unit - VAS 6622A-

• Funnel, flexible - VAS 6675-

Draining oil

• Lift the vehicle up with the lifting platform and place the used oil collection and extraction unit - VAS 6622A- underneath the front axle differential lock.
• Use funnel, flexible - VAS 6675- to drain the oil.
• Place flexible funnel - VAS 6675- such that subframe does not come in contact with oil.

The illustration shows an example of how to use the flexible funnel - VAS 6675- .

• Unscrew drain plug -arrow- and drain high-performance oil for all-wheel drive coupling completely.
• Attach the new oil drain plug -arrow- and tighten with the appropriate tightening torque.

Fill oil

• Insert the -A- of the charging device - VAS 6291A- through the engine compartment.

• Lift the vehicle up with the lifting platform and place the used oil collection and extraction unit - VAS 6622A- underneath the front axle differential lock.
• Clean area around oil filler plug -arrow- of front differential lock.
• Remove oil filler plug -arrow-.

• Remove the elbow of the filling device - VAS 6291A- .
• Insert the hose -A- of the filling device - VAS 6291A- into the oil filler hole -arrow-.

NOTICE The prescribed temperature range for oil during oil level check is 20 ºC to 40 ºC.

After topping up oil, the temperature gauge - VAS 6519- can be used for measuring oil temperature.

Oil capacity and oil specification.

• Screw on the oil reservoir to the filling device - VAS 6291Awith closed valve -arrow-.
• Open the valve -arrow- of the filling device - VAS 6291A- and hold up the oil container.
• Fill with oil until it overflows between hose and gearbox housing.
• Close the valve -arrow- of the filling device - VAS 6291A- .
• Remove the hose and allow the excess oil to run into the used oil collection and extraction unit - VAS 6622A- .
• Attach the previously removed elbow back onto the filling device - VAS 6291A- and fix with a hose clip.
• The oil level is correct if it is at the lower edge of the oil filler hole.

• Attach the new oil filler plug -arrow- and tighten with the appropriate tightening torque.

Ensure adherence to prescribed temperature range during oil level check, if oil temperature was not within prescribed temperature range of 20 ºC to 40 ºC when topping up oil.

The oil temperature can be measured using temperature gauge - VAS 6519- .

If the oil temperature is not between 20 and 40 ºC, the temperature must be reached by warming up or cooling down.