So, I've had the 730d for 2 months. Here's my report.
I love it. The comfort is just superb after I worked out the best way to place the comfort seats. Handling is excellent for a car of this size too. I think the Dynamic Drive has a lot to do with that though.
I've averaged 35mpg so far with 45mpg on long motorway trips.
Performance is adequate and I certainly don't find myself wanting for more grunt. The torquey nature of the soot thrower suits motorway and a-road overtaking very well. Engine is silent at cruising speeds but makes a diesely sound when pushed. I still don't like the sound it makes at idle or when being driven around town when cold. Sounds like a bag of old spanners. How anyone can state "Modern diesels are so good, you don't know it's a diesel from inside as it's so quiet". That's a load of crap from people trying to justify their purchase. You CAN tell it's a diesel. It sounds like one. Not like a 4cyl shaker, but a diesel nonethless. I guess 318d owners need to try to feel good about their cars somehow.
The engine really has me in a bit of a quandry. I like the economy and the midrange torque but I dislike the sound. Unfortunately, the only engine that's going to get me the torque and the sound together is the 6.0 V12 but there is no way I can afford to run one. So, I think maybe more diesels will be in my future for daily drivers.
So, to sum up after 3000 miles.
Likes:
Comfort
Space
Silence when cruising
Ergonomics are just superb
i-drive
Road presence
Equipment
Soft close doors
Economy
Performance
Handling
Headlamps are like portable suns
Dislikes:
High-beam assist. It's just too slow.
i-drive brightness at night
Engine sound at idle
Navigation system is absolutely rubbish (I use my iphone instead)
Stereo isn't very good. I am taking steps to fix this
So, all in all I'm happy. We shall see what the next 12 months brings as far as running costs are concerned. I have a service coming up in 2000 miles for a brake fuid change and cabin filter.
What age is the disk in your Sat-Nav as found it on my 3 it improved dramatically with the later versions. Other than the annoying nag from the TMC re-routing its pretty decent now