Moin Moin! We are talking about buying a new Rio in the household, but before we actually buy it or even invest the time for a test drive, something important has to be clarified. And that is: What about HiFi upgrade options? I would like to install a decent radio in this if a car is bought and also subwoofers, power amplifiers and good front sound speakers should not be missing. What about the installation options? DIN or Double-DI N? Connections? Cable connections from the battery to the interior? What speaker size in the doors? Insulation of the doors simple or complicated? After all, there is nothing to snort or scrape, even if I drive properly level. And: The car has standard daytime running lights. However, as I will not only drive on the highway, these must be switchable or disabled. Possible? Thank you for your help!