Im one week into bongo ownership, and its great.
Ive just fitted a neat little unit i found on ebay (it was mentioned in old post but thought people might want to know how i fitted it.)
1st heres the unit i bought
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0183318209
2nd remove the interior light
3rd unplug the interior light
4th solder wire one on to the permanent ground (black on one of the push buttons)

5th solder wire on to the switched ground (red/green going to door/ off switch)

6th tuck unit into the gap in the middle of ligthts.
7th plug lamps back in and test. (set little pot to set delay time)
8th put lamp bak in headling.
im pleased with it and for £5 it takes away one of the little problems with my bongo.
hope this is of use.
Ive been replacing lamps in switches and climate unit today too if any ones interested?? i took pics etc.
cheers all
steve