I recently had the trans fluid changed in my '01 C320 at 44000 miles which amounted to 1/2 the fluid since the torque converter has no drain plug. The formerly "lifetime" fluid is now to be changed at 39000 miles.

I paid $14.81 per quart (or maybe liter) which included the dealer's usual above retail add-on.

I noticed an improvement in shift quality right away. The fluid used in my 5-speed auto is 001-989-21-03-10.

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Roger E.