The 206cc plip will only lock, not unlock the boot. In order to unlock the
boot, you need to use the key every time :( I'm trying to mod this on my
2003 mux model, I wondered if anyone else had done it and suceeded and can
give me some pointers?

These instructions (in German) explain how to do this on the 2001/2002
models (non mux) and suggest on that model they ground the "unlock" side of
the boot actuator and only connect up the +12v pulse to the "lock" side of
it. Restoring (re-running) the "unlock" pulse wire to the BSI restores this.
One of the mods given here adds a microswitch so the boot only unlocks
without the key when the roof is up.

http://www.ccfreunde.de/apportal/main.php?module=bastelecke206&c=bastelecke2
06&artid=68
http://www.ccfreunde.de/apportal/main.php?module=bastelecke206&c=bastelecke2
06&artid=51

I had a quick look at mine and the two cables disappear into the loom down
the left hand side with a yellow/green and light brown cable (numbers
10425/2010 and 21/0710). I ran out of time to look further for now but if
anyone has any pointers I'd be grateful. I'm just conscious on the mux model
they may have run both wires back to the BSI and disabled the feature in
software.

Cheers
Dave