New case 307 tape-change parking sensor problem

My car 2006 model 307 HDI PREMIUM I had a cd changer, I dismantled them, pioneer AVH-4450BT Double din device, I installed the device for the steering control, I got the appropriate apparatus for the steering control, but the steering control worked. "Apple-tab-span" style = "white-space: pre;">

I called Pioneer distributor name in Istanbul, I talked with the authorities. Apple-tab-span "style =" white-space: pre; "> I tried to buy an OEM device I told you that you can not get the sound of the parking sensor in the oem devices for peugeot 307, they just said that your controller will work. (NAVIGOLD LIKE BRANDS)

There is a brand called Flyaudio for 307 I asked the device, they said 1600 TL, but they said that it is necessary to install a separate interface in order to hear the sound of the parking sensors. They said it would cost 300 TL in total, they said it would cost 1,900 TL in total, which came too much for me ...

In short, can I make a nice sound system for this car and use the features of the car?