OK, so the car is now run in, and showing just shy of 1500 miles. Just thought I'd post a few more thoughts.
I stuck to the running in rules in spirit at least, avoiding engine speeds over 3500 RPM, but allowing the engine, once warmed up (oil temperature gauge is very useful here), the odd brief burst of hard acceleration. I also tried to vary speeds and loads as much as possible. Now, at 1500 miles, the engine is very gutsy and responsibe, if still disappointingly gruff. BMW will not win any awards for refinement with this engine, although it is very smooth, thanks in part I suspect to the hideously complex flywheel fitted to this ED version.
Economy Ăs typically running short of the combined figure, and of the fuel computer's suggestion. I'm averaging so far 55.1 mpg based on brim to brim calculations. For a fairly gutsy 5 seat saloon, it's an impressive figure, but short of the 61 mpg on the computer, and the 69 mpg official combined figure by some way. That said, I have encountered some hideous traffic over the past few weeks (one 20 mile trip took 3.5 hrs), and been exploring the performance post run-in, so I'm prepared to give it a little more time before passing judgment. I don't doubt that on a long run, and with ECO PRO mode engaged, > 60 mpg will be easily achievable.
It does go really rather well. I tend to leave it in Sport mode most of the time, as the sharper throttle response and weightier steering make the other modes feel rather dull. Acceleration is swift and instantaneous, with very little lag, and the ability in 4th and 5th gears to pull you past a ton with ridiculous ease. Overtaking performance is good too, this being tested by a crawl up the A10 to Kings Lynn last week. Tractors and artics were despatched effortlessly, without any need to row the gearbox. There are faster cars obviously, but this really does have all the performance you really need for day to day driving, and if you use all the power available, you are into illegal speeds very quickly, and more importantly, very effortlessly. It's just a shame that, motorway cruising aside, the engine's fuel type is painfully obvious from anywhere inside the car.
I was quite harsh on the handling early on, but a mix of familarity, and the scrubbing in of the Michelin Energy tyres, as suggested earlier in this thread, has improved matters. It is still not as much fun as the E90 was, being softer, more roll prone, and with less feel through the steering. But when you push it, it still has that lovely BMW balance, with the sense that both ends of the car work together in the corners. The expected understeer hasn't really emerged, and it responds well to throttle changes in the corners, allowing the line to be trimmed. Yet it still somehow lacks the feeling of confidence, and sheer "planted-ness" that made the E90 so much fun. But it is better than I initially thought.
I am enjoying the inside of the car very much. The seats and driving position are good enough to make a four hour trip completely painless, and the materials are superb. Everyone without exception who has been in the car has instantly commented on the finish, and the high standard of the materials used. The only fly in the ointment is the reflection of the dash top in the windscreen, which irritated me at first, but which I have now got used to.
The i-Drive is intuitive, and familiar enough now that I can navigate through it without any more than a brief glance at the screen. The audio system is superb compared to the E90, and a 32GB flash drive plugged into the centre cubby hole provides easily navigable MP3 sounds. It's just a shame that BMW have the gall to charge you extra on a £28000 car for proper iPod integration via the USB slot, although it has the same line level auxiliary input as the E90.
Oh, and nothing has gone wrong, broken or fallen off yet! :-) Based on very variable experiences with my previous E90s, and those of friends with more recent BMWs I know of, I am not taking reliability for granted.
So, that's about it really. Will keep you posted.
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