w220 cd changer and 2.5 problems

hello people, I have some problems with my s-class bj. 2000. I refitted a dvd player a year ago, that you can operate over the comand 2.5. however, the dvd player has broken, it would supposedly not have been a guarantee case and a new one should cost 180 euro. no matter, the sound was before totally fucked up, therefore I decided to retrofit my cd changer, original is better. I shot a cheap today, an MC 3010, fits the overworked??? what kind of cable set bruc I know I need 12v, mass, a wake up signal etc. but I can’t find a cable set like that!!!! but I don’t have a boss sound system. so I would have to take the light conductor signal from the phone. I’ve already seen no cable in the trunk. would it be easier to put the changer in the glove compartment??? that’s in 2min outside… one more. my r adio reception is totally bad..in the city I find maybe 5 channels, even there is the quality bad!!! amplifier def?? there are cheap amplifiers that you switch between the antennas..brings what?? or has the other reason?? thank you already!!!