Well you're just lucky that he had a PhD and was able to work out such a complicated car...Yes indeed. She needed attention and that’s why she was sticking out her tong every time I open the back doors. That was freaky!
I followed your and bayhas advice and took her back to the shop where the alarm was fitted. By the way, the alarm is a Mercedes Benz approved alarm and the fitter is a Mercedes Benz approved fitter!!
As always, I had to listen to the same silly excuse I am given, everytime anyone try to fit anything on her...your car is very complicated (or as someone called it sophisticated) with so many wires and fuses that confuse even the most expert technician....Yeh.. an 11 year old car confuses the most expert technician...what a load of rubbish?
Anyway, they eventually managed to identify the problem (the alarm was causing some feedback which confused the boot handle) and fixed it. No harm done.
Many thanks for your advice