Car radio: purchase advice+opportunities

Moin, after receiving a miserable consultation from Conrad Elektronik, I am now trying on this way. I would like to buy and install a new car radio with the following functions: -Aux connection -USB connection -CD not necessary -Bluetooth capable with possibility of hands-free via mobile phone I have: -Pegeot 206 sw -ready to replace the boxes in the front doors in 2xJBL with 55Watt each. My radio can currently use a multifunction lever under the steering wheel ebenfa lls are operated. Can I continue to use the lever after an exchange? I certainly need some adapters to connect the new radio. Which one? Thank you very much! Here are a few photos. Achso that radio should be as convenient as we can be when providing functionality. And discreetly so that no one comes to the idea to steal it :>