Well here might be some bad news, the only thing that will be wrong with that Polo handbrake will be that it needs a bit of maintenance carried out on it, so no chance of warranty, or FOC work being done there.
Point to note, from my experience of VW Group products, none of them include brake maintenance in the service activities, that comes at an extra cost - and normally gets offered after the service has been done, which annoys me greatly!! Luckily I tend to do all my own brake work on my cars.
SEAT, my daughter's late 2009
Ibiza forced her to phone me for
help maybe during/after its first winter - due to the handbrake being seized on, I suggested that she phoned the AA as they support SEAT during the initial warranty period and an AA patrol would reach her quicker than I could, AA patrol turned up quickly after she phoned for their
help, patrol man used a rubber mallet of the offending wheel - job done! A few years later I cleaned all that car's brakes out etc as, like I said, SEAT will not touch these areas during a minor or major service, they will off course report on the condition of the pads and discs though.
Edit:- that is not just an issue with Polos,
Ibiza and Fabia will also have that issue, as do most other cars used in cold wet areas and especially those that do not get adequate maintenance on their brakes!