Q.Aux for Volkswagen vento

Unfortunately, Volkswagen seriously missed out on offering this basic functionality with the earlier Vento and Polo. You can't add Aux to the existing system. But there is a work around. You can buy an FM transmitter (Worldtech, Bekin and others) and plug your phone or MP3 player to that. The FM transmitter will then broadcast your music via FM, and you can use the radio to listen to them. Clarity though is not that great. The only other option is to invest in a new system.

Pls guide me how to get Aux facility in the Volkswagen Vento Highline 2012 model. Installing a new Audio System with Navigation is more than 40 K , whereas my requirement is only Aux. Pls help.