I have to remove the ECU from my car and have it sent off to England for testing and probable repair.

As some of you may recall from my previous posts, I was having a major ongoing issue with cylinder 6 misfires. Everything has now been eliminated apart from the ECU and I've read further that my CLK symptoms are a common enough issue due to the coil burning back the ECU (or something along those lines).

Can anyone help me locate where the ECU is in the car so I can get this sorted out once and for all?