When I got no answers here I posted on 206 info exchange and got some replies, although none of them were any help
for whats regarded as the best selling car ever made (206 hatchback anyway) there seems to be a lot goes wrong with it that no one can give a definitive answer, guess that comes down to the nature of the blooming computerized fusebox.
It's true that a lot of problems are caused by new owners that don't understand how the car works.
My roof problem turned out to be a disabled ecu for safety (which is easily resettable with pp2000) that was triggered from manually operating the roof many times and the problem that started it all off was the micro switch that detects when the roof drops into the boot needed some adjustment. By the time I discovered it I had well knackered the rear parcel shelf mechanism trying to force it and had to replace it.
My speedo problem should have been a simple process of elimination but pp2000 diagnosis was really confusing and I even replaced the instrument panel thinking it might be faulty, i'm glad I did this though because the previous owner had unscrupulously popped out the air bag led's to get it through the last mot - bodging tw@t.
Despite all the warnings about battery removal, over the months i've worked on mine I have many times forgot all about the procedure and yanked of the positive without thinking and many times have reconnected it and just started it straight up without turning on sidelights first and no problems so far.
Starting to think the battery procedure is a bit of a farce tbh but then ive seen plenty of weird electrical problems on simple old peugeots over the years including engine ecu's that just die all of a sudden and some time after magicallly start working again.
For anyone that did offer me any advice on my problems I thank you all, it was very frustrating working on the electrical system with it being multiplexed, my first time tackling one. I have plenty of knowledge to give back now though
Col that damm window dropping problem turned out to be the 2 pin blue connector that goes into the passenger door loom wasn't plugged in. It looked like someone had yanked out the glovebox and pulled it out of its holder (being located directly behind it) when I first discovered it.
I didn't know this at the time but recently I fitted a second hand door and when I got to the wiring I recognised the connector as I disconnected it. God knows why it made the drivers window drop constantly with the engine running though.
