I am a newbie to this , so only seen your message tonight. Had the same problem. RAC Trakstar fitted to car was pulling too much power from main battery, I had to have the unit replaced via Trakstar. This was a fault found in the Trakstar unit. Eventually the car was taken to Halleys where RAC Trakstar replaced the unit free of charge. I have an 04 plate STI. Trakstar admitted to the fault. This may be the same problem you are having. Hope this helps.