GLC has lots of circuits that stop a few hours after ignition off (or if battery gets low). So if you are installing a cam that can sleep and wake-up with a G sensor then its no so trivial.
Alternatively, if you were going to install a Power Magic Plus to give this feature, you may not need to as you can pick one that goes to sleep after 6 hours
Richard
Alternatively, if you were going to install a Power Magic Plus to give this feature, you may not need to as you can pick one that goes to sleep after 6 hours
Richard