If you look at your rear windows there are two marked arrows at the top. The rear bar slots inbetween the arrows and you just tighten the roof bar up until it grips your car. This is probably what the above message is about, if you tighten them up too much they will crumple your roof but its clear to see what your doing and they dont need fastening that hard. They are very secure when placed correctly. The front one has an extra attachment, it has a clip that fits inside the door ( small hole in middle ).
Roof Bars cost £115, Bike Ski cost £70. Cheaper than tow bar etc i looked at.
I dont like the ones that go on the boot / rear of the car.
Let me know how you get one
There is a known fault with the SEAT bar system - my father's old car was the first one (in the UK at least) to suffer from them. This was an 03 5 door model bought brand new with the roof bars. The dealer fitted the bars for him and torqued the bars to the recommended settings. On removing the bars, they were found to have lightly creased the roof at the mounting points.
The car was returned to SEAT UK for evaluation including photos sent to SEAT technical in Spain and my father received a new car FOC. The new car suffered very slight creasing at one corner due to the bars, but no worse than this. My father always slightly undertorqued the fittings after his experience with the first car.
EDIT -
The SEAT accessory site isn't working for the
mk4 Ibiza at the moment, but I remember when I was looking for my last
IBiza (around a year ago) the roof bars weren't available to buy from SEAT. The local dealer seemed to think they'd be discontinued - most likely due to persistent problems with roof damage.