It doesn't seem like the door is the problem to me. It seems to be moving alright. I would probably start looking at the sensors. You said in your previous post (bit confusing ) that you had a temperature reading of '-3'. That's not supposed to be possible.
It's a bit risky gapping iridium plugs, but they can be done successfully. I can't remember for sure whether it was iridium or platinum plugs you shouldn't regap. It can be done, but you could stuff them up.
There's also no gains in using the lower/cheaper fuel. The car's tuned to 100ron fuel and if you run it on 95ron, you'll get shittier mileage (you'll have to fill up more meaning more money). Just buy the good fuel straight away and you'll protect your engine and have a heavier wallet.
Just service your car like any other.
Sounds like this could be related to the hicas? Try searching 'hicas' and you'll find that others will have some sort of power steering problems and probably a solution too.
Check your fuse before you do anything else. Don't be like R34NRG who changed almost everything and found out in the end that it was his fuse giving him the shits.
It's the sensor on your gearbox. You need to get it replaced. The sensor is right near the top of the gearbox and it would be pretty hard to get to if you don't have a hoist.
You're going to need some sort of courier to do the work for you. Try contacting a company like toll ipec. I think they do some sort of couriering(sp?).