Making sure you get the right part -
The only guaranteed way to get the right part is to start with the VW part number. VW have a parts system called ETKA. This used to be readily available "unofficially" on ebay but VW have made it harder and harder to obtain/load on your own computer. Various websites have popped over the years with this catalogue available online. The current one is :
http://www.oemepc.com
but this has started some intrusive advertising of late so I don't know how long it will be around.
For aftermarket parts brands like Hella, Bosch, Febi, Sachs etc the magic word is "ecat", short for e-catalogue. Type in any manufacturer followed by ecat and you will enter a magical realm of quality parts availability. Once you armed with the manufacturers part number you can search that and find the best price.
Here are the ones I have bookmarked - a lot of these will give you the equivalent VW part number too
http://www.bosch-automotive-catalog.com/en/?country=GB
http://cars.febi-parts.com/vehicle.php?lang=GB
http://www.brakebook.com/bb/pagid/en_GB ... 82?reset=1
https://www.bremboparts.com/europe/en
http://www.ferodo.co.uk/catalogue.html
Sachs/Lemforder (clutch+suspension)- https://webcat.zf.com
SKF (bearings) - http://ows-cdn.tecdoc.net/skf/home.jsp? ... 4a94f205fa
Contitech (belts) http://aam-europe.contitech.de/pages/we ... _en.cshtml
https://www.hella.com/hella-tech-world-uk-en/index.html (this one requires registering and maybe being creative with the truth)
There are loads more - NGK, Gates etc etc. So there really is no excuse for getting the wrong part!
Getting the right part number - a guide
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Be clear - e.g - Mk1 Bumper clips, Mk2 filler neck - 55l tank, Mk2 wiper motor (single wiper) - you get the drift?
Be clear - e.g - Mk1 Bumper clips, Mk2 filler neck - 55l tank, Mk2 wiper motor (single wiper) - you get the drift?