Whether you are replace the 2012 2013 2014 2015 VW Volkswagen Polo factory radio now or later, you can take a look at this post to get useful upgrade guide.
Volkswagen POLO 2012-2015 Aftermarket Radio Upgrade DAB (Free Backup Camera)
Vw155U
Volkswagen POLO 2012-2015 Aftermarket Radio Upgrade
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Bluetooth Stereo for 2012 2013 2014 2015 VW Volkswagen Polo
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2012 2013 2014 2015 VW Volkswagen POLO Navigation System wit
Car Stereo Upgrade kit for Volkswagen Polo 2010-2014 - Reverse Safe
Volkswagen POLO 2012-2015 Aftermarket Radio Upgrade DAB (Free Backup Camera)
Volkswagen Polo (2012-2015) Plug & Play Head Unit Upgrade Kit: Car Rad – CJ INDUSTRIES
Volkswagen Series Aftermarket Radio Upgrade