Multi-disc brakes B2, B3 and locking gear in "Parking"
2 - Transmission housing; 11 - Bolts; 14 - Multi-disc brake B2; 15-Locking gear for "Parking"; 133 - Multi-disc brake; B3, 133a - Retaining ring; 133b - Spring gasket
Checking the clearance "L" in the multi-disc brake B3
2 - Transmission housing (outer brake support B3); 14a - Piston; 133a - Outer disc thickness 6.5 mm; 133b, 133c - Outer discs 1.8 mm thick; 133d - Disc spring; 133e - Friction discs; 133f - Retaining ring; "L" - Gap
Disassembly
1. Remove the gearbox from the torque converter.
2. Remove the B3 multi-disc brake (133) and spring lining (133b), removing the retaining ring (133a) from the transmission housing.
Information copied from the website mercedesman.ru
3. Unscrew the bolts (11).
4. Remove the multi-disc brake B2 (14) from the transmission housing.
5. Remove the "Parking" locking gear (15).
Assembly
Assembly is carried out in the reverse order of disassembly. Check and measure the clearance in the B3 multi-disc brake. Clearance "L" in the B3 multi-disc brake: 1.0 - 1.4 mm.
Fit the B3 brake discs together in the order shown in Illustration 12.6 and insert them one by one. Measure the clearance "L" between the retaining ring (133f) and the outer disc (133a) at three points. During the measurement, the retaining ring (133f) should touch the upper bearing ring in the groove of the outer brake support (2).
Adjust the clearance with the circlips (133f) if necessary. Circlip thickness: 3.2, 3.5, 3.8, 4.1, 4.4 and 4.7 mm.