Valve Block 1 In Driver Seat -N475- / Valve Block 1 In Front Passenger Seat -N477- And Air Cushions, Removing And Installing: Removing

-- Remove the backrest seat cover and cushion. Refer to BACKREST COVER AND CUSHION, REMOVING AND INSTALLING, COMFORT SEATS .

-- Disconnect the connector -2- from the Valve Block 2 in Driver Seat - N476- / Valve Block 2 in Front Passenger Seat - N478- by pressing the safety catch -arrow B-.

Courtesy of AUDI

-- Remove the pneumatic line -1- by carefully lifting the safety catch slightly with a small screwdriver -arrow A-

-- Remove the t Valve Block 2 in Driver Sea -N476- / Valve Block 2 in Front Passenger Seat -N478-.

-- Disconnect the pneumatic lines -1- to the seat bolster inflation adjuster on the left and right side of the seat by carefully lifting the safety catch slightly using a small screwdriver -arrow-

Courtesy of AUDI

-- Unscrew the left and right side bolster adjuster -1- from the backrest frame -arrow- and remove.

Courtesy of AUDI

-- Disconnect the connector -1- on the Valve Block 1 in Driver Seat -N475- / Valve Block 1 in Front Passenger Seat -N477- by pressing the safety catch.

Courtesy of AUDI

-- Cut through the pneumatic line -2- to the Valve Block 1 in Driver Seat -N475- / Valve Block 1 in Front Passenger Seat -N477-. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .

• Dimension -a- = 120 mm

-- Remove the bolt -arrow-.

Courtesy of AUDI

-- Free up the wiring harness and pneumatic lines on the module carrier.

-- Move the module carrier -1- with the lumbar support air cushions forward, disengage from the backrest frame -2- -arrows- and remove it.

Courtesy of AUDI