Julian
I was trying to remove the grey button with a small pick ...i torn the rubber boot of it and ended up buggering it up somewhat ..... i cannot see how you could take the handle apart without wrecking it .
The Uni t 203 is just a hand held volt meter / inductive amps clamp ....its handy just for doing quick ' asleep testing ' .
On the our pico scope i can set say a 24 hour time base and leave it hooked up to the car in the workshop overnight ...... then where i see a blip on the graph i can expand it out to see whats happening in more detail .
Passenger side end of dash fuse box , 42 vehicle access system
Where i would start is put your amp meter on the battery ..... i would say an inductive one is a better choice here as most multimeters will not carry the load that these a8s have when they wake .....you will end up popping fuses on the meter all the time , or use a meter and use a shunt between battery and heavy lead .
Roll the boot catch over lock the car and just watch the meter in the boot for a time to see what amps its pulling .