Is it advisable (or even preferable) to do a AT fluid change on a 1999 ML 430 with the 722.6 transmission using Fuchs Titan 4134 ATF developed for the 722.9 transmission? This would result in mixing whatever is left of the original ATF 001-989-21-03-10 with the newest ATF 001-989-68-03-10.

Any problems if I do this?

Any benefits?

Thank you--Jim Herold

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Jim Herold--Current: 1987 190E 16V, 1999 ML 430--Past: 1971 280 SL, 1972 250