Alright so quick question guys...got my new 335is...almost broken in and am at 920 miles. Right around 700 miles I started to hear this weird noise coming from the middle of my car during cold start. From start to about 3K RPM it sounds like a weird screech from perhaps the exhaust pipe not being bolted on tight enough but once the car is warmed up it goes away. Usually after 3K RPM the turbo spool either masks the sound or it goes away. Since I am still breaking the car in I am not going above 4K RPM so cannot tell all too well. Notice that it goes away though within about 10-15 min of driving.
Any ideas or anyone else have a similar experience? Is this normal? If not I will probably be taking it into the dealer for a checkup, just sucks that a brand new car already worried about something like this.