@ berserker: I don't have a brandname from the headlightbulbs, there just a pair of those cheap asian xenon-gas-filled H4 bulbs, nothing special, costed my just about 10 euro
![Laughing :lol:](./images/smilies/icon_lol.gif)
and are still working after 1,5 years
and brand of the remote+central locking is Meta Systems, didn't install it myself, got it done by a professional bussiness, with a certificate for my insurance company
![Wink :wink:](./images/smilies/icon_wink.gif)
costed me quit a lot, but lowers my insurance premium
And that tube you asked about, the function of that tube is to "use" the warm air coming from the exhaustmanifold to heat up your engine faster during cold times (winters etc.), when the engine is heated up, it automatically shuts this hose, and starts "using" the colder air from the other tube which is also connected to the original air-filter.
It can easily be removed and won't have any effect on your car whatsoever