Went for a drive at the dealer on the new M5 and the limiter was not removed. It was limited to 5500 RPM. Very annoying. The dealer wasn't very informed about the car and didn't know to turn off the feature for the customers to drive the car properly. Needless to say the car felt sluggish and lifeless. Very different from e39 M5. Closer to M3 actually. There is nothing up to 4K RPM - after that the car gets a kick, but the limiter kills it at 5500.
I've had M3 for 3 years now and it spends 30-40 days at the track - the only way to drive it is to rev it. Keep it 6-8K RPM and the car is lightning, below 5K M3 has nothing. e60 M5 was very similar.
Ok now to the topic of the thread. e60 M5 comes with the limiter (good thing for the transporting personnel who have no need to rev the cold engines to 8K to put it on the ramp). But the dealer has the option to remove the limiter right away and not wait till 1200 miles. (similar to e46 M3)
I broke in many engines in my life and the best way to do it is to apply compression and power to the rings while they are being sealed. You have to use full RPM range.
The only way to be cautions about is to warm up the oil. Whnt the oil is 210 and higher - go to town. Not saying beat on the engine and hang it in 1st at 8K, but give it progressive full throttle acceleration through all gears, use engine braking, very engine speeds. The worst thing you can do to the new engine is to lag it. And that's seems to be the believe because of the way the manuals are written.
Went to 2 schools at BMW South Carolina. They use brand new cars and they don't wait for 1200 miles to drive them. Just last Wednesday and Thursday BMW NA brought new e60 M5s to Lime Rock - they were not limited. Several BMW mechanics confirmed that it is done to cover the *** for parts malfunction (like oil pump failure, SMG hick ups) and mainly to make the driver learn the car. Engines are running at the factory before they are put in the cars and the tolerances are so tight now, there is nothing to be afraid of.
Ask your dealer to remove the limiter and turn all the features on - don't torture yourself and the car.
Here is the link to a similar opinion on web site;