Wow! A thread about me!
Thank you geoffers for trying to help me.
My IS200 is the 2002 model. I have started a thread about my search for the amplifier in the euro forum a few weeks ago (For those who can read german: Link).
In the forum they said it must be on the passengers side and my dealer said it must be on the drivers side.
I even uploaded a few pics of those places in my car where the amp is supposed to be. For those interested (keep in mind my steering wheel is on the left side): Link. I've already been told that my page was cute ) Everyone said there must be an amp and it really drove me crazy.
Boergy was the one who also has an IS with an integrated amp. Yes, I told geoffers he was from Switzerland, but I was wrong. He is from Austria. ('tschuldigung boergy )