Filling my car with petrol?

I'm just concerned because my one of my mums friends told me that always filling up your car with half a tank of fuel does the car no good?

Well since I been driving and had my car 4 months a ford ka, I've never let it go past half a tank of fuel should I let it go to empty then fill up? :-/

Fiat 500 or volkswagen up?

Hi guys I'm 18 and am looking at buying a new car in January. Currently I'm driving my mums old ford ka but it's expensive on tax insurance and I'd like to spend my money on something newer. Insurance is £1300 fully comp for the ka but £900 for the fiat 500 and vw up.
Basically I'm really torn between these 2 cars. I'd like a red car but I'm not sure on the volkswagen up or fiat 500. If you could give me some more info and tell me which one is more reliable etc that would be great

Slight knocking sound from car but when I put clutch on it goes?

Then comes back when I take my foot off the clutch
I drive a ford KA 2008
I had the clutch changed in May 2014
I have a feeling tho the guy didn't change it because he was taking ages to print me a receipt saying the printer needed ink
I dunno I found it suspicious
The gears are a little stiff too

Any help?
I'm in the uk thanks

My indicators and hazards have stopped working?

I had this problem with my ford ka 56 plate and the relay switch got changed as they said this was the problem but 4 weeks later they have stopped working again. They don't come on at all. Any ideas what could be causing it as surely it can't be the switch again as its just been changed

How long can I drive my car for after battery light came on?

I have a 2001 ford ka and earlier today the battery light on the dashboard came on, I googled what it is and think it's the alternator. I'm getting it serviced next Wednesday but need to make a 40 minute journey tomorrow but not sure whether to risk it or not?

Where can i buy a wiring loom for a ford ka 1992?

My central locking and drivers side speaker isn't working and i can see some damage and corrosion to the wiring loom. I just need to find an acceptable one. I'd prefere not to buy from ebay as the quality could be bad and arrise more issues.

Sticky car steering wheel?

I have a ford ka, and I was cleaning the interior and decided to clean the steering wheel; sticky black stuff came out in the cloth and I thought it was dirt so then went to reverse my car and my hand got stuck to the steering wheel, I took my hand off and I had black stuff on it, now i can't clean it properly because my hands get black, help?!