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Originally Posted by ROGER E.
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, thanks for the reply. That part number corresponds to the original (old) fluid for the 722.6. Are you saying you had a "drain and fill" done through the pan drain plug using this fluid? I understand your car has no torque converter drain plug as well.. This would mean that much less than half the fluid was changed if that were the case.
Anyway, ~$45 for 3 liters of the old style fluid, plus you said you noticed an improvement, I guess sticking with the originall stuff wouldn't be too bad. Although, it's sooo tempting to try the new stuff if it's actually cheaper and better. Sounds too good to be true perhaps.
