Rather than start a new thread, I thought I'd respond here. I have what appears to be a common issue in that the Sterling (Toad) Excel transponder type immobiliser will not disarm on my 2004 R300 K-series. I had have the problem intermittently since the winter and have a couple of times managed to get the immobiliser to recognise the fob by following the reset instructions. But most of the time, the LED flashes away, and the fuel pump does not prime. The battery is a new Banner purchased over the winter and measures 12.7V. I also have a battery cut-off switch, and so isolate the battery when the car is tucked up in the garage. I have the scuttle off and cannot find anything obviously amiss with the wiring. My current plan is to replace the immobiliser with a contact type one (Sterling Touch). Before I go ahead, does anyone have any other suggestions to get the car started, or alternatives to my predicament? It is frustrating to say the least that I've not been able to get out in the Seven this year. Thanks in advance!