Signalman705

I recently had the 70K AT service done on my 2014 C-350 with the 7G-tronic plus transmission, at a local Mercedes indie specialist in my area. This was the standard pan drop, new filter and new pan gasket and replacing the same amount of fluid that was extracted from the pan drop. The tech, according to the work order/invoice, filled up the trans.with 6 quarts of fresh fluid. I'm just trying to see what percentage of fluid was replaced. I think the trans. holds either 12 qts or 9 qts of ATF but I haven't found the definitive answer yet, in my research.

If anyone has this information, please let me know.
Thanks.

Bob

soldr230

Liters not quarts.

(almost or about 10 liters or so)

Signalman705

Thanks for the info.

10 liters equates to approximately 10.57 quarts so If this is accurate, the amount of the old ATF fluid that was replaced with the fresh fluid was just over half of the total capacity (57%).

This was about what I expected for the pan drop and filter replacement.

soldr230

Some models do not have a drain plug on the TQ.

Tom in Austin

Yes, the amount of fluid used correlates to whether the torque converter was drained in the process. In general, the procedure calls for initially putting back the amount that comes out, plus a quart. Then the mysterious steps of bringing the transmission up to operating temperature and pumping in more fluid until it begins to run back out the drain plug. All because the stuff expands as it heats and therefore the exact amount needed is only known by following these steps.

Discussed many times in more detail in other posts, including a PDF of the actual factory workshop instruction page(s) ...