Hey Kevin,

I'm attaching a link to a tech article from our site that I think you'll find super helpful; esp with the upgrade you mentioned wanting to do. If you have any further questions, please do not hesitate to post a Comment just below the article and someone will get back to you with more info. Hope this helps and best of luck!

Mercedes-Benz W210 Auxiliary iPod Input (1996-03) E320, E420 | Pelican Parts DIY Maintenance Article


-Dmitry