For anyone wanting more high-level inputs to the 2002-2003 ES300, I have
good news. I took a chance on a relatively new product called AUXLEX from
Soundgate. It harnesses directly into the factory radio and adds 2
additional high-level inputs via rca jacks. I wired in my XM Skyfi2 and it
works absolutely perfectly with my non-navigation standard factory radio.
This is the only product on the market claiming to be compatible with the
02/03 ES300 without the navigation option. A little pricey at $270, but to
me, it was well worth the expense. Prior to this, I had been using the
Delphi "hack", the FM modulator. Actually, I had tried two different Delphi
models of FM Modulator, the one with the 3 adjustable frequencies was the
better of the two, but they both still sucked. I had to drive the Skyfi2
output level all the way to minimum to prevent distortion, so when quiet
classical music was playing, I got tons of hiss when gaining up the radio.
Not to mention the interference and static when driving on the Atlanta
interstates. This AUXLEX works absolutely perfectly, and it sounds as good
as the built-in CD changer. I now have the Skyfi2 gained up to max, so the
levels from the XM match the radio and CD, and it is clear sounding and
perfect. I don't work for Soundgate, nor do I have any affiliation or
interest in their success, but I am THOROUGHLY delighted with their AUXLEX
product. I've been waiting a very long time for this solution to come to
market, and I am not disappointed.