It's an auto and yes, so far I've been driving like miss daisy's grandma. With the exception of the odd acceleration test of course.
We did a 520 mile round trip to get it so mostly motorway driving on the way home on cruise control.
Very impressed so far although I fully expect the mpg figure to drop to mid 30s like you say
.
Did you ever re map your 530d? The gains are too significant to turn a blind eye to.