BMW have finally identified the irritating noise coming from the fuel tank area in the Z4 - turns out it is emissions control pipework that moves as the valve actuates. Multiple times per second.
They are going to replace the valve and pipework to try and cure the noise - there was a revised part issued so I am hopeful of a complete fix.
In related news, I am driving around in a new 220i Active Tourer M Sport Auto. It has every possible option ticked as far as I can tell...
Traffic Jam Assist is superb. The headlights in this car are also superb but I'm not sure how I tell if they are Adaptive or just High Beam Assistant. Either way, they are leagues ahead of the lights in the Z4 which are already very good. Driving on the motorway last night in it and the way it lights up the road is astoundingly good.
As cars go, BMW have a long way to go to fix the FWDness of it. It really suffers from torque steer and it is far too quick to get messy at the front with a bit of acceleration mid-corner. That aside, everything about this car is "quite good". Sure, it has a stuck-on screen in the dash and the interior is basically a 1-series but despite hating the interior of the 1er, I find it acceptable in this car.
I wouldn't have one personally but I can see why people would buy one over an S-Max etc.