Can anyone tell me the "Spec's of the Becker Grand Prix in my 300CE?

I understand it's only 20-25 watts or so split between the 4 speakers if I have heard the correct info.

I want to replace the factory speakers with a "mild upgrade". The current sound is'nt really "too bad now".

Anyone upgrade speakers with the stock system?.

Also, Does anyone know if there are any "line in" jacks etc on this for an amp? (yes I know, I'm "reaching" but being a Becker, you never know...)

and Last Question (I promise). I'm so used to my other cars,....How is this factory unit removed? Anyone that has removed one, please give me your input should I decide to remove/replace it.

Thanks