Quote:
Originally Posted by RichReg
Since 550i isn't listed (yet), its possible that the Air-suspension will be available only on that model. 
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That wouldn't make much sense, unfortunately...
It looks like there may be an M550i coming at some point, but no 550i.
Also, BMW is working on a new 4.0 V8TT which hopefully won't have the issues of the N63 engines. Maybe the M550i will get that engine?