I was wondering if there is any way to find out if I can add an aux to my car I've looked in the glove box and it's not there I've also looked under the carpet looking for the white connector I don't know if I've missed it or if my car just doesn't have it and if there is any other way to add an aux

 

Check the left wall in the glovebox, there should be one. If not just get a Bluetooth Transciever, but a good quality one if setup right you wont be able to tell a difference

 

On my 2009 CLK350, I pulled the cover off of the end of the dashboard and the aux jack was rolled up in there. It had never been installed. I just punched out the pre-cut hole in the glove box and pushed it in. Works great. Maybe you'll get lucky and it will be in there.

 

From what I understand some cars have a connector under the trim at the bottom of the passenger door. Others require removing the stereo head unit and plugging it into the back. I have looked in my 2007 CLK 350 and could not find one on the passenger side. My next step is to take apart the center console and see if I can plug one in to the back of my head unit. Maybe you will be lucky and have it rolled up beside the glove box but if not I think all CLKs could have an aux installed.

 

You might have the fiber optic setup with a 2004. If that's the case I wouldn't bother. It is a massive PITA to retrofit a clean aux input.

With mine I ended up replacing the head unit with a samsung tablet and ditched the CD changer and fiber optic amp in the trunk but kept all of the speakers It was surprisingly easy.
It's been 6 years now and it's a massive improvement over the dated oem setup.

 

Personally I just install my own everything. New Speakers, Sub, Amp, Head-unit, and new speaker wiring does not take long.









So much clearer and nicer than garbage HK