Seeking radio/CD/speaker upgrade recommendations

[stu99]

I have a factory fitted Mercedes branded radio/cd player in my 03 SLK - I think it is a model 10 which I'd like to upgrade and perhaps change the original speakers at the same time.

I after sound quality rather than volume.

Any recommendations?

 

[television]

I do not know what the difference is between the Audio10 and 20,maybe someone else knows