Installing piston K1 outer multi-disc carrier - AR27.51-P-0800-01A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Sleeve (140 589 00 14 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Sleeve (126 589 10 14 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Check for leaks between outer multi-disc carrier (1) and piston guide ring (18)

Pour some paraffin or petroleum ether into the piston guide ring (18) and check for leaks.

If there are leaks, press out snap ring (16), remove piston guide ring (18) and replace sealing ring (17).

When installing the piston guide ring (18), ensure correct seating of the ball (19).

Fig 3: Identifying Piston Guide Ring And Snap Ring
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Installation
Insert radial lip-type sealing rings (12 and 13) in piston (2).

The sealing lips must point downwards (in the direction of the arrow).
Place insert sleeve (021) and (022) in outer multi-disc carrier (1).
Lubricate insert sleeves and radial lip-type sealing ring with ATF oil and carefully insert piston (2) and press into outer multi-disc carrier (1) without canting it over.

Fig 4: Locating Radial Lip-Type Sealing Rings
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.