I have a Mk III SEL Exec 2.0 TSI DSG 220. Brilliant car, I just love it! 

I have had one issue with it since new. Noise or vibration from the brakes when applied for a long period, most noticable when slowing down from motorway speeds, although it can be heard when braking from lower speeds too. It can be heard under both heavy and light braking. It got noisier after about 8000 miles, so around 10k miles I asked my local Skoda dealership investigate. Brakes still worked well and the car stopped without issue. They said it needed new brakes (discs and pads) and got authorisation (after some effort/debate about wear and tear) from skoda to replace the discs and pads. After the repair the sound was better but still noticeable. The sound seems to come from the rear brakes now. When I booked my car in for its first service (around 15k) I asked them to investigate. This time they replaced the rear discs and pads at Skoda's cost. Again the problem appeared to be resolved, but recently (18k miles) I have noticed the sound once again seeming to come from the rear brakes. The sound reminds me of the sound made by worn-out wheel bearings, except unlike worn bearings this only happens when braking and gets louder the longer you press the brake pedal. Any ideas or similar issues out there? 

I've had a noticeable noise from the rear brakes from new.

Had a loan Octavia out and it had the same noise but far worse!

Thanks for sharing Facet. Can you describe the sound? 

Rear disc brakes don’t get applied much in normal use, much less if your gentle on the brakes. This leads to corrosion on the rear discs that causes the noise when the brakes are applied. It used to be handy if you had a manual handbrake where you could occasionally gently apply it when moving to keep the rear discs clean. Unfortunately with an EHB you can’t really do this, so you need to give the brake a good workout now and again to keep the corrosion on the rear discs at bay. Also it helps if you avoid getting wheel cleaner on the discs.

Thanks for the reply Kenny. The noise gets louder the longer you brake and it sounds different from the sound discs make when the car is first used after standing for a while, so that doesn't fit as well with the corrosion theory. Also my current car is my second Mark III Superb I have owned. My previous one (a 2.0 TDI SE Tech) didn't make the noise / have the same problem. So it's definitely an issue on this particular car.