Mine's been standing up to abuse including regular WOT highway-speed downshifts (exercise) for 145k miles.....knock on wood

Fluid/filter every 40k.......yes all electronics and a conductor plate were done under warranty, but the basic mechanical internals are 10 years old and perform flawlessly to this day

If you have one that's defective, I think it would have been evident before now. If you've got over 50k and 5 years on a 722.6, and it hasn't grendaded, you don't have a defective tranny........if it dies at any point after this, it's because YOU didn't maintain it properly

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL