722.9 Transmission Fluid Change Actions

Change in the transmission fluid can be a real challenge! Here we will talk about 722.9 transmission fluid change, and how any user can complete it by himself! This manual offers guidance on how to check the amount of transmission fluid in a Mercedes-Benz 722.9 transmission, commonly known as a 7G-Tronic or NAG2 transmission.

The 722.9 doesn’t have a dipstick that you may use to check the level of the gearbox fluid. The overflow method is used to monitor the fluid level on the 7-speed transmission. An overflow pipe sits atop the drain stopper within the gearbox pan. This pipe’s height is utilized to guarantee the proper level of transmission fluid.

What You’ll Require For 722.9 Transmission Fluid Change

  • Drain plug washer 007603012102;
  • Transmission Fluid ATF 3353 or A001 989 45 03 10;
  • 722.9 Transmission Adapter
  • Work gloves, a fluid transfer pump, an Allen key socket set, a socket wrench, an IR thermometer, an oil drain pan, a torque wrench, a floor jack, and jack stands.
Change 722.9 Transmission Fluid Change

722.9 Transmission Fluid Change Procedure

Take your automobile for a quick 10-minute drive to warm it up because the transmission needs to be at a particular temperature before you can check the fluid level.

Lift the car at all four wheels to check that it is level. On a lift is the simplest method to accomplish this. Lift the front and back sides of the automobile if you don’t have access to a lift. Make sure the car is level and firmly supported by jack stands while you fasten it.

Remove the transmission-side splash guard in its entirety. For the screws to be removed, an 8mm socket is required. Find the drain plug at the transmission pan’s base. Then use a 6mm Allen key to pry it free, but hold off on removing it just yet.

Put a pan of water beneath the drain plug. Get inside the car, start the engine, and point an IR thermometer at the transmission oil pan to check the temperature of the transmission. A sophisticated diagnostic scanner can also be used to check the temperature of the transmission oil. Then push the gearbox lever through P-R-D and back multiple times with the transmission at 45 °C. Remove the drain plug by going back underneath the vehicle.

Proceed The Change

Pay close attention to what transpires. If no fluid emerges, the fluid level is too low. Proceed to the previous step If oil drips in little amounts, the fluid level is correct; if there is a strong, continuous flow, the fluid level is too high. Then skip to the next step.

Change Materials

If the transmission fluid level is low, add 1 liter of transmission fluid to the transfer pump. Insert the pump hose’s filler adapter into the drain plug, then turn the valve. Then after pumping 0.5 quarts, shut off the valve.

Unplug the filler adapter and let extra fluid leak out until there is very little left to drain. If no transmission fluid is leaking out, add more and continue as necessary.

Hold off until the flow of extra transmission fluid is at a minimum. So using a torque wrench, reinstall the transmission drain plug, and tighten it to 17 lb-ft. Replace all remaining components.

The most common automatic transmission in Mercedes vehicles produced after 2005 is the 7G-Tronic or NAG2. Around 2000, the 722.9 gearboxes were put into European cars, while in the US, they were put into the majority of models from 2005 and later.

The 7-speed transmission from Mercedes-Benz is an excellent gearbox that provides better performance, quicker shift times, and better fuel efficiency. Since there is no dipstick inside this transmission, many automobile owners find it difficult to check the transmission fluid level.


In the US, the Mercedes-Benz 722.9 transmission first appeared in a few distinct models in 2004, while the C-Class first appeared in Europe in 2000.

722.9 Transmission Fluid Change
  • SLK (R171 beginning in September 2004; M Class W164 beginning in 2005
  • Starting in 2005, the R Class W251, the G Class X164, the CLS 350 and 500, the E Class, and starting in 2006, the R Class W251.
  • For a number of chassis, including the 164, 171, 203, 204, 207, 209, 211, 212, 215, 216, 219, 220, 221, 230, 251, and 463, the 722.9 became the standard transmission.
  • Around 2006–2007, the last models to switch from the 722.6 to the 722.9 were those with 4Matic.

Random Posts

Leave a Reply

Your email address will not be published. Required fields are marked *