Over the next half an hour, the court heard, she tried to manoeuvre the vehicle but due to the lack of traction it slipped down the hill, finally coming to rest against a parked Honda.
When officers arrived at the scene they found her asleep in the driver's seat with the car's engine running.
"Police noticed a strong smell of alcohol," court documents said.
"When spoken to, the defendant was too intoxicated and couldn't give a clear explanation of the events."
A test gave a breath-alcohol level of 1151mcg — nearly five times the legal limit.
Counsel Brendan Stephenson said his client was experiencing personal difficulties at the time of the incident but things had since improved.
Bell had casual work as a hairdresser, was abstaining from alcohol and had the support of her family, he said.
Judge Peter Rollo noted the defendant had a previous drink-driving conviction from 2013 and two as an under-20 driver but said a fine would be too burdensome.
Bell was sentenced to 12 months' supervision and was disqualified for 28 days with the alcohol-interlock licensing provisions to follow.
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