It has an N62...

Misfires on start up can be caused my an intermediate lever problem in the valvetronic system. Very expensive repair.

I have this problem with mine. Usually (if it's not too cold outside) a simple restart of the engine will solve the problem. When it's extremely cold outside I have to keep the RPM's around 2k for 60 seconds or so after starting and it prevents the misfire.

Also, the crankcase vent valves being faulty can cause this. They are a very cheap fix. 15 bucks or so a piece (there are 2, one in each valve cover) from ECS.

__________________
Current Bimmer
2004 X5 4.4i Sterling Grey Sport/Premium

Past Bimmers
1991 318I Alpine White
1995 740I Alpine White
1991 525I Schwartz
1998 323IS Scwartz
2004 330CI Cabrio Titanium Silver Metallic
1995 540I Schwartz
2000 Z4 3.0 Titanium Silver
2000 330ci Coupe Titanium Silver