Gearbox Mercedes 722.4

The 4-speed automatic transmission Mercedes 722.4 or W4A020 has been produced since 1981 and was installed on many of the most popular rear-wheel drive models of the German concern. This transmission is designed for engines up to 3.0 liters and 250 Nm of torque.

This series includes: 722.3, 722.4, 722.5, 722.6, 722.7, 722.9, 725.0.


Production years since 1981
Type automatic transmission
Number of gears 4
Type of drive rear
Engine volume, l up to 3.0
Torque output, Nm up to 250
Recommended oil DEXRON III or VI
Oil capacity, liter 6.7
Replacing the oil every 70,000 km
Replacing the filter every 70,000 km
Gearbox lifespan, km ~300 000

Gear ratios Mercedes 722.4

Using the example of a Mercedes C-Class 1994 with a 1.8 liter engine:

Main 3.230
1st 4.250
2nd 2.410
3rd 1.490
4th 1.000
Reverse 5.670

The transmission was installed on:

  • Mercedes C-Class W202 in 1993 – 1996;
  • Mercedes E-Class W123 in 1981 – 1985; E-Class W124 in 1986 – 1996;
  • Mercedes S-Class W126 in 1985 – 1991.

Disadvantages of the Mercedes 722.4 gearbox

  • Excellent reliability allows the gearbox to operate up to 200,000 km without any problems.
  • The main causes of breakdowns are contamination of the lubricant and severe overheating.
  • Most often, the reverse package in automatic transmissions is repaired, in which the springs are destroyed.
  • Often you have to clean the hydraulic unit from dirt and change the vacuum modulator.

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