I've posted this in the Oily Bits forum, about the 722.6 five-speed transmission in my '03 49K-miler ML320: "Once in fifth gear, the transmission will not downshift automatically over about 40 mph even at full throttle, and the kickdown does not seem to work at all. Using the Tiptronic for manual shifts everything is normal, so I doubt it is a gearbox mechanical problem." I'm now used to the much more responsive seven-speed boxes in the much more powerful AMGs, and I know the 722.6 'box in the E55Ks had much more performance-orientated shift points anyway. The kickdown switch I can and will fix or adjust. However, thinking about it, the 'box may in fact be changing gears exactly as it is programmed to. Pootling around town, it shifts up and down perfectly. I can't find a single mention of my 'problem 'anywhere on the internet. ISTR that on at least one of my W211s (can't recall exactly which one; there have been so many...) I found the gearbox surprisingly unwilling to change down on the motorway unless I used either Tiptronic or kickdown. The ML is a pretty sedate car, and getting into top gear early and staying there might well be exactly what MB envisaged most of its buyers would prefer. Is there anyone else on here with an M112-engine/722.6 'box car that would comment on their gearchange downshift points?