Sounds like the transmission could be physically OK and maybe just a one-off computer glitch. Neverthess, still worrisome, I'm sure. Keep everything documented in case you need to seek further corrective action (e.g. Lemon Law, etc). Hopefully you will never see it again. I'm guessing 426 is transmission oil. Not sure how much it holds but maybe a liter is a small amount and they just wanted to be sure it was at the max, since there was a potential issue (just covering their bases I guess).
2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired:'09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, 01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i, ..., '86 4000CS Quattro, ... too many to list
Last edited by noka; 03-14-2013 at 05:42 AM.