Materials required for changing automatic transmission oil in Mercedes GLS 350d:
* New original Mercedes-Benz ATF 236.14 oil (about 6 liters)
* New automatic transmission filter (part number: 223 277 00 02)
* New automatic transmission pan o-ring (part number: 223 277 02 35)
* Automatic transmission drain plug gasket (part number: 223 277 01 84)
* Special scanner for resetting automatic transmission adaptive values (for example, Mercedes Benz Star Diagnosis)
Tools required to change automatic transmission oil:
* Set of socket wrenches
* Phillips screwdriver
* Funnel
* Long nose pliers
* Oil drain pan
Steps to change automatic transmission oil in Mercedes GLS 350d:
1. Prepare the car. Place the vehicle on a level surface and apply the parking brake.
2. Remove the automatic transmission pan. Unscrew the bolts securing the automatic transmission pan using a socket wrench. Carefully separate the pan from the automatic transmission and drain the remaining oil into the drain pan.
3. Replace the automatic transmission filter. Remove the old filter from the automatic transmission using long-nose pliers. Clean the seat from dirt and install a new filter.
4. Install a new O-ring. Clean the sealing ring seat on the automatic transmission pan and install a new sealing ring.
5. Install the drain plug gasket. Clean the drain plug and replace the gasket with a new one. Screw the drain plug back into the automatic transmission.
6. Reinstall the automatic transmission pan. Apply a thin layer of sealant to the surface of the pan and install it on the automatic transmission. Tighten the bolts using a socket wrench.
7. Fill in new automatic transmission oil. Using a funnel, pour new automatic transmission oil into the automatic transmission through the filler plug. Fill in about 6 liters of oil.
8. Check the automatic transmission oil level. Start the engine and let it idle. Shift the gear lever to all positions and return it to the park position. Check the oil level using the automatic transmission dipstick. The oil level should be between the “min” and “max” marks. Add more oil if necessary.
9. Reset the automatic transmission adaptive values. Connect the scanner to the car and reset the automatic transmission adaptive values. This step is important to ensure optimal operation of the automatic transmission with new oil.
Recommendations:
* Change automatic transmission oil every 60,000-80,000 km or every 4 years, whichever comes first.
* Use only original Mercedes-Benz ATF 236.14 oil. Using the wrong oil can damage the automatic transmission.
* Be sure to reset the automatic transmission adaptive values after changing the oil.
*If you are unsure of your skills, have a qualified mechanic perform an automatic transmission oil change.