It just that cars that I've driven before with shed loads of tourque allways go quicker by short shifting. There really is no need to push the 335d to the red line as the output torque would be less than what is available in the next gear up. The torque drops off rapidly after 4500RPM so if it were me I would use that as an absolute limit. Maybe in ds mode the shift points are nearer 5000RPM, I don't know, I haven't finished running in yet.
Previously: 2007 335D MSport E90 Le Mans Blue, 2004 330D A Sport Silver Grey, 2002 330D A Sport Saphire Black, 2001 320D SE Touring Titanium Silver, 1998 M3 Evo Techno Violet, 1996 328i Sport Montreal Blue, 1994 325i Coupe Red, 1989 325i Sport 2 door Dolphin Grey,1986 325i SE 4 door Lachs