Just an FYI guys but there is really only one trans fluid that was designed SPECIFICALLY for these transmissions and it is the 236.10 spec from Mercedes which was Shell 3403 (MB P/N 001-989-21-03-10) and aside from old dealer stock, is only available now through FEBI who are the ones that originally packaged and distributed the OE Benz fluid in the first place. For the NA guys, you probably won't notice a difference with the 236.12 and 236.14 (both of which were designed for the 7-speed, NOT the 5-speed transmission) but the SRT6 guys will if you have an acute sense of how your car shifts. I would NOT run ANY other trans fluid regardless of what they say it's spec'd for as many are going off the older 722.5 and even the 722.4 transmission specs. These transmissions are pretty finicky and while everyone is entitled to use whatever fluid they choose in their car, I never have, nor will I in the future use a fluid not designed for the specific transmission it's going in. The 236.12 fluids were the first for the 7-speed and the .14 was a follow-up for customer complaints of firm shifting (read, they changed the friction modifiers for smoother shifting and more slip in the transmission)

So a rundown of the available trans fluids

236.10 - MB P/N 001-989-21-03-10 - Designed for the 722.6 5-speeds in our cars and will produce the firmest and most accurate shifts

236.12 - MB P/N 001-989-45-03-10 - Designed for the 722.9 7-speeds and MB also used it in the 5-speeds to reduce the number fluids they had to stock

236-14 - MB P/N 001-989-68-03-10 - Redesigned fluid for the 722.9 7-speeds to mitigate customer complaints of firm shifting