The Tesla fills a third of the dash with a warning, my mercedes had NO INDICATION WHATSOEVER for the trunk being open, my Mitsubishi had a red light on the dash less than 1/4" tall.... The Tesla is MUCH better at warning you.
I don't know what year your Benz was, but my 2008 R-Class had a loud-ish, high-pitched "beeeeeeep!" if any of the doors, including the rear hatch were open while trying to drive. Maybe this is different for Canada?
So here's the ACTUAL operation of the car when you put it in drive with the rear hatch open:
1. The tiny red "door's ajar" icon is lit in the upper right of the dash.
2. The left dash pane has a picture of the car with an amber trunk to indicate the trunk is open.
3. There are NO noises indicating anything is wrong.
4. When you put it in drive,
the left pane CHANGES from showing the hatch open to displaying the low speed front bumper sensor status and the rear hatch indication graphic goes away. Still
NO noises.
So this means you can put the car in Drive, look down at the dash and only notice the little red icon that "some door is open"
Now, here's what happens when you put the car in Drive when a side door is open:
1. Left dash pane changes from showing the side door open to showing the front bumper sensors.
2. Little red "door's ajar" icon is lit.
3. High pitched "beep beep beep!" is heard. This is similar to "there's something terribly wrong with the car" noise.
4. The "Driver's Door Open" message pops up on the lower middle of the dash.
5. The car slams to a halt after driving a foot or two, automatically.
What's wrong with requesting Tesla at least add some beeps when the rear hatch is open when you put it in drive, ESPECIALLY when you have the third row seats with CHILDREN in the back???