All vehicles should have this feature and here is another I think trucks need

[Grumpaw]

My tailgate down warning is Reverse gear when the backup camera shows my hitch ball.

My warning is the "Mark One Eyeball".....it is 100% accurate, and lets me know immediately if the tailgate is up or down !!!
"Eyeball to Brain...the tailgate is DOWN....WARNING WARNING WARNING"
If it is down, and I want it up, I put it up. If it is up and I want it down, I put it down.
Easy Peesy, and no electronics to worry about.

As a side note....The same Mark One Eyeball Warning System works equally well to let me know if the hood is in the up or down position !!!

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[Friday yet?]

My wife is just the opposite. If she cleans it at all, it's a "dry-clean."

 

[Grumpaw]

Warning....Warning....I don't need no stinking warning.....when my horsey tail up, I know he ready to poop....when tail down I know he finish !!!

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