Disco 2 Rear Air Springs.

Guys,
What's the method of lowering the rear on a Disco 2?  There is a
button on the dash to raise the rear for offroading but nothing about
lowering the back for access - the dogs need it :-)

The CD autochanger is also failing to respond, although there are cds
in the rack the head unit always displays the ' no cd' message when
trying to select the CD option.

I hate driving a Diesel - SLOW - the old 4.6 Series 2A is much faster
than this TD5 :-)

Thanks,
Alastair