Perc
Very Odd Looking Vehicular Object
Heh, I thought about that when I was ordering the Tesla, but I don't ride my bike enough and also think that they're ugly. Fold away ones are great but are just another thing to break.
Fold-away towbars are not made for salty and grimy places. Mine has a microswitch in it that activates a safety beep whenever the towbar isn't fully locked in or out. Only my towbar didn't stop beeping when I folded it in... it was the way when I got it, two year old car. I fixed that by unplugging the buzzer.
Last spring, after not being in use for the entire winter, there was enough dirt and crap in the mechanism that it prevented it from locking tightly in the outer position. There was about a centimeter's worth of play. A bit of fine adjustment with a sledgehammer didn't fix it, but driving 30km with an unsprung car trailer (pictured above) did.