ace rothstein 81 wrote:As soon as something comes out that will allow me to use all of my steering wheel controls as I am now while using an aftermarket head, that is what I will get and then I'll go with a better head unit and see how much better my sound can really be.
Exactly, I wouldn't replace the stock HU on a SL with convenience because not having the buttons work would drive me absolutely nuts.
Anyway... as far as "amps" go on stock SLs... only the ones with the audio package have one, and it's a small one that controls the sub.
It IS possible to add amps to the existing HU system, but since it has no RCA outputs, it would have to be a speaker-level amp, which are both harder to find and harder to install.
And yes, I did technically have an amp installed in my car recently. The amp is integrated to the sub in this case, so the wiring is much like a plain jane amp, except there's also an extra cable for the remote sub audio control. Which has been relocated to under my glove box, basically... we did a "set it and forget it".
But I'll just reiterate...I do not think it is a good idea to change the stock HU on a V with either the convenience or audio packages at this point, as you'll have to replace the system basically stem to stern, and you'll loose the wheel controls because at this point, no aftermarket adapter is made that makes all of the controls work.