How to Check the Fluid Level in Mercedes 722.6 Sealed Life Transmission

Jan 21, 2023

If you own a Mercedes vehicle equipped with the 722.6 sealed life transmission, it is crucial to regularly check the fluid level to ensure optimal performance and longevity. In this comprehensive guide, Grafco Electric will walk you through the step-by-step process of checking the fluid level in your Mercedes 722.6 sealed life transmission.

Why is Checking Fluid Level Important?

Checking the fluid level in your Mercedes 722.6 sealed life transmission is essential for several reasons. Firstly, proper fluid levels ensure that all the internal components of the transmission are sufficiently lubricated, reducing friction and heat buildup. This, in turn, helps prevent premature wear and damage.

Additionally, inadequate fluid levels can lead to transmission slip, poor shifting performance, and potential transmission failure. Regularly checking the fluid level allows you to detect any potential leaks or issues early on, preventing further damage and costly repairs.

Step-by-Step Guide to Check Fluid Level

Follow these detailed steps provided by Grafco Electric to check the fluid level in your Mercedes 722.6 sealed life transmission:

  1. Step 1: Park on a Level Surface
  2. Park your Mercedes vehicle on a level surface, ensuring that the engine is turned off and the parking brake is engaged. Safety should always be a priority when working on or around your vehicle.

  3. Step 2: Locate the Transmission Dipstick
  4. Open the hood of your Mercedes vehicle and locate the transmission dipstick. The dipstick is usually labeled and can be found near the back of the engine compartment, towards the firewall. Refer to your vehicle's owner's manual for specific details.

  5. Step 3: Check Fluid Level
  6. With a clean cloth or paper towel, remove the transmission dipstick from its tube. Wipe it clean and reinsert it fully into the tube. Ensure it is fully seated.

    Retrieve the dipstick again and observe the fluid level. The dipstick usually has markings indicating the proper fluid level range. Ideally, the fluid should be within this range. If the fluid level is below the minimum mark, you will need to add transmission fluid. Alternatively, if the fluid level exceeds the maximum mark, an excess of fluid may need to be drained or the transmission may require professional attention.

  7. Step 4: Add or Drain Fluid (if necessary)
  8. If you need to add transmission fluid, use a suitable funnel to pour it slowly through the dipstick tube. Be cautious not to overfill, as this can cause fluid foaming and other issues.

    Conversely, if the fluid level is too high, it is recommended to drain the excess fluid following the manufacturer's instructions. Seek professional assistance if needed.

  9. Step 5: Recheck Fluid Level
  10. Once you have added or drained the fluid as required, reinsert the dipstick fully and remove it again. Confirm that the fluid level is now within the proper range. If necessary, repeat the process until the fluid level is correct.

  11. Step 6: Secure Dipstick and Close the Hood
  12. When you have completed checking and adjusting the fluid level, securely reinsert the dipstick into its tube. Close the hood of your Mercedes vehicle, ensuring that it is properly locked in place.


Regularly checking the fluid level in your Mercedes 722.6 sealed life transmission plays a crucial role in maintaining its optimal functionality and extending its lifespan. By following the step-by-step guide provided by Grafco Electric, you can confidently ensure that your Mercedes vehicle remains in excellent working condition.

Remember, if you encounter any difficulties or are unsure about the process, it is always recommended to consult with a qualified automotive professional or refer to your vehicle's owner's manual for specific instructions pertaining to your model.