Wind deflectors

I've ordered these: https://www.ebay.com/itm/SEAT-IBIZA...deflectors-4-pc-set-HEKO-28244-/112764910457?

I suppose I might get them this or next week.

What is the wind noise level like on a MK6?

Do you really want more of it? I've never had Hekos that made the car quieter thats for sure.

I've already had Heko's wind deflectors earlier, I didn't notice increased noise or fuel consumption. I'm planning to install additional sound insulation anyway. I don't remember if the wind noise was noticeable on the motorway... it isn't in the city where I mostly drive.

In the rest of the world, what Brits are calling a Mk6 is a Mk5 so a 2017 MkV sounds right to me.

I'm 99% sure they should be right, but if you can wait a couple of days, when I get them I'll post here whether they really fit.

Uhh... I need help.

I can confirm that the deflectors from the link above indeed fit 2017/2018 Ibiza nicely.

However... the package contains not only 4 deflectors, but also 4 plastic pieces that seem to be intended to be wedged somehow between the deflectors and the door, I'm guessing to make them more securely mounted. But I just can't figure out where & how I'm supposed to put them.

The front 2 deflectors are held in place by the shape of the door, they might not need the wedge pieces. But the rear 2 tend to fall out and really need something additional to keep them securely in place. Could anyone please explain how they are supposed to be installed?

There were no instructions in the package. There's a small sketch in the little plastic bag with wedge pieces, but I just don't understand it. Apparently there are four phases of installing them... or four ways to use them... somewhere, somehow...

Those clips are to be used if the deflector needs help in staying in, my fronts are fine but the rears need help.

https://youtu.be/dnSRJ_d_dw0

Good vid from Micksgarage on fitting. They also describe which way round to use the clips.