Hello friends I just got a 2002 SLK R170, he has an Alpine radio in it, whose quality I can’t estimate, and also when Googlen did not find much. Would you replace or keep the part? Would the sound get better, with a better radio? I have another radio, which I could use there too. Of Kenwood. But whether this is an improvement, no idea. At least the operation is much better. After all, a rotary switch for the loudst ke, plus which remembers the radio stations, the Alpine not The speakers of my car actually make a good sound, the bass is also good, but will be completely tinkering when it gets louder. The seller has connected the car radio with a cable, on which one can probably connect a footspace subwoofer. Photo attached. Does this just work so plug&play? What do I have to pay attention to when searching for a subwoofer? Would not like to invest time, energy & costs. If then minimal, if for which the effect is high