Hi , I have a few questions to ask about my Polo TSI and hope somebody kind here to answer my questions .

I intend to change my Polo's Audio System ( RCD210 ) to a RCD510 which I'm going to buy on eBay .
But after I change the audio system , will the parking aid system on the RCD210 still appear on the RCD510 ?
Also , is it easy to change it ? How much would it cost if I ask someone to change it for me ?
Would my warranty be voided if I change it ?

Hope someone could answer my questions . thanks !

Hi ,
I recently got my Volkswagen Polo .
However , out of 4 refuels , 1 full tank could only travel me 300-400km .
Which equivalents to > 10L/100KM .
Is there any tips to save fuel ? I heard the Polo TSI is a very fuel economy car ?