In response to:
I've had 2 brand new TD4 autos since last October (I'm not flush but LR dealer replaced my first one after 3 months due to failure of the auto box). I'm still getting around to figuring out the way engine braking is provided but the best (aka most exciting) ride I get is on a longish slow incline (say 1:12) at around 40 mph where, with throttle off, the engine revs drop then suddenly (and more predictable from my growing experience) the auto box shifts down accompanied by a sudden increase in rpm (you have to take account of the drive by wire throttle i suppose). It's quite alarming at first but once you know it's going to happen, it actually helps rather than hinders.
You could of course use the sport/steptronic mode if you need extra assistance although I'd be a bit hesitant to keep stepping back to see if the rev limiter works as intended !!
With regard to "pinting" the console, I tried that once but spilt the beer all down my jeans. try installing the optional cup-holder on the dash :o)
Rob.