Dingle means a minor car crash, here in Australia at least. I thought it might be more widespread, but the only reference I could find is from our national broadcaster. I'd be interested to know the etymology of this.

"Most crashes aren't serious, but even a minor dingle can be stressful for motorists."
from an ABC Radio National transcript
http://www.abc.net.au/rn/talks/bbing/stories/s678210.htm

Clark Gormley
Newcastle NSW Australia