Mercedes-Benz W212 7G-Tronic automatic fluid and fluid change
W212 7G-Tronic: which automatic transmission fluid is suitable?
The fluid specification depends on the car. Cars with start-stop or equipment code A89, which requires low-friction fluid, need class 236.15 fluid. Others can use class 236.14. Class 236.15 should not be replaced with 236.14. Check the correct fluid in the service book, not just from the canister.
How is the fluid level of the W212 7G-Tronic transmission checked?
The transmission has no fluid level sensor, so the level is checked manually. The diagnostic tool does not show the fluid level directly. Filling and level checking are done with a special tool through the drain plug, so the job is best left to a workshop.
How often is the W212 automatic transmission fluid changed?
The interval varies: in the service book the 7G+ transmission of start-stop cars has a longer interval than the older 7G transmission. Professionals' recommendations also differ from each other. Find out the interval for your own car from the service book or a service shop.