My coolant light came on at 7k miles, first cold morning of the year basically and my car was parked on a slight angle.
It took not even a few oz. I have a feeling if I drove around for a bit, the light would have turned off.
But it's not unusual to get a coolant light in a 335i.
Enjoy the car.
Quaife LSD by VAC, JRZ RS Pro, full M3 susp, TCK monoball kit, Mich. PSS, brake ducts, SS brake lines, UUC SSK, BMW Perf. Exhaust/steering wheel/CF spoiler/Style 269 19s, ETS FMIC, ER CP, VAC RSIK, Sparcos