Selector lever
The lever has six positions:
- R - parking
- R — reverse
- N — neutral
- D — automatic engagement of all forward gears
- 3 - automatic engagement of I, II and III gears
- 2 - automatic engagement of I and II gears
Indicator | Gearbox type | ||
722.402* | 722.112** | ||
Number of gears | 5 | 5 | 5 |
Engine models | M 102 | M 123, M 110 | M 110, M 123 |
Broadcast | Gear ratios | ||
| 1st gear | 4,25 | 3,98 | 3,68 |
| 2nd gear | 2,41 | 2,39 | 2,41 |
| 3rd gear | 1,49 | 1,46 | 1,44 |
IV gear | 1,00 | 1,00 | 1,00 |
Reverse | 5,67 | 5,47 | 5,14 |
[Full article available on the resource: mercedesman.ru]
* Automatic transmission on cars produced after 1980.
** The automatic transmission was available in two gear ratios.
Characteristic | Meaning |
Control pressure, type 722.402/722.400, kg/cm | |
modulating pressure | 2,3/2,9 |
working pressure | 11,5±1,0/13,8±1,0 |
centrifugal regulator pressure | |
| 1,0/1,0 |
| 2,5/2,5 |
Torque converter
Characteristic | Meaning |
Torque converter diameter, mm | 245 |
Torque converter speed (when checking) with brakes locked, not less than, rpm | 1600—1800 |
Gearbox oil
Characteristic | Meaning |
Gearbox housing filling capacity, l | |
| 6,6 |
| 5,5 |
Oil used | ATF |
Replacement frequency | every 60,000 km |
Note: Automatic transmission failures are almost always caused by low oil levels or improperly adjusted selector drive or downshift rod.
The oil level, if it has a temperature of about 80°C, should be near the "MAX" mark on the dipstick. At an oil temperature of 20-30°C, the level should be at the "X" mark above the "MIN" mark.
Model | Dimension "X", mm |
200 to 5.83 | 30 |
230 | |
230E up to 4.83 | |
250 to 8.81 | |
280 | |
280E to 8.81 | |
| 200 s 6.83 | 12 |
| 230E from 5.83 | |
| 250 s 9.81 | 10 |
| 280E from 9.81 |
Tightening torques of main threaded connections, kgf·m
Connection type | Meaning |
| Hydraulic block mounting bolt | 0,8 |
| Oil pan mounting bolt | 0,8 |
| Oil pan and transformer drain plug | 1,4 |
| Vacuum regulator mounting bolt | 0,8 |
| Phillips head screw for oil filter mounting | 0,4 |
| Output shaft flange fastening nut | 12,0 |
| Rear pump mounting bolt | 0,8 |
| Front cover to front pump mounting bolt | 2,0 |
| Transformer leading flange mounting bolt | 4,2 |
| Bolt for fastening the transformer or front cover to the gearbox housing | 1,3 |
| Bolt for fastening the rear cover to the gearbox housing | 1,3 |
| Centrifugal governor bracket mounting nut | 0,6 |
| Starter and reverse light switch | 0,8 |
| Foot shift control solenoid valve | 2,0 |
| Control socket plugs | 1,3 |
Automatic transmission mounting bolt to engine block | |
| 5,5 |
| 6,5 |
| Solenoid valve for pedal shift control | 2,0 |
| Control socket plugs | 1,3 |
Automatic transmission parts
1 - torque converter; 2 - front pump housing; 3 - input shaft; 4 - front planetary gear; 5 - output shaft and rear planetary gear; 6 - external satellite; 7 - ring gear; 8 - parking brake gear; 9 - speedometer drive pinion; 10 - output shaft flange; 11 - flange mounting nut; 12 - bearings; 13 - clutch cup; 14 - clutch drum; 15 - sealing ring; 16 - Front clutch piston; 17 - outer clutch discs; 18 - inner clutch discs; 19 - retaining ring; 20 - rear clutch drum; 21 - piston; 22 - Front Clutch Band Brake; 23 - rear clutch band brake; 24 - clutch drive piston; 25 - pushers; 26 - centrifugal regulator