Did you order in person, over the phone or on the internet ?
There can be issues if they just go by what the catalogue says should be on your car. I had this problem with the Cat converter on my Mk3. The garage ordered the standard part and got it in, then came to fitting and found it didn't fit my car, because for a short period of time VW put a different part on that model. Had to get one custom made
Also if someone has uprated the brakes on the car, then the standard pads may not fit.
Over the production run of the Mk2, various parts changed so that some bits from earlier cars don't fit later cars. But if for example your car had some repair work done later, then the later parts may have been fitted by the garage and now your car won't match the exact factory spec, so parts you order won't fit either.
Later on in the Mk2 production life, the run-out 8v models sometimes got parts from the 16v parts bin too.
Your safest bet is to get the precise part number off the existing part, then ask for it specifically. And check with the retailer that you can bring it back if it doesn't fit.
