The ECU is located inside a black plastic box near the passenger side fender. The lid is held by 2 clips. Just unclip the clips and inside you will see the ECU. There should be 5 plugs attached to the ECU, just unplug it all and ship it to me. It's best to pack it in a anti-static bag (the ones you get from buy computer hardware).

About the insurance, we had no problems with lost packages ever, but if you want to be on the safe side, insure it for around $800-1000 as a new one is around that price. Remember to ship it with tracking available via Fedex or UPS.

The chip will not work well with a supercharger as the ignition timing is advanced too much and will cause knocking and detonation which will lead to engine damage.

I'm waiting for a reply from the headquarters to see if I can include the Crossfires into the Mercedes groupbuy. If they are ok with it, the groupbuy pricing will be $540cdn installed. We provide free next day return shipping if needed. We will ship the ECU out back the same day we receive it if possible, if not it will be next business day.

Hope I answered all your questions.
Gary