Belgrave Police, responding to reports by an off-duty protective service officer, discovered a vehicle blocking half of Morris Road in Upwey overnight on Tuesday 13 December.
Police said the vehicle was still running, with a man lying in the backseat unconscious but still breathing.
After an ambulance was called when police made multiple attempts to wake the man verbally and with lights and sirens, police members broke the back window before the man was woken by paramedics and medically cleared.
Police said when they searched the vehicle and man, they found a shopping bag containing dried cannabis and a large sum of money.
Police allege the man had driven from Box Hill earlier in the night and he was arrested and interviewed in relation to a suspended license, trafficking, possession of a drug of dependence and proceeds of a crime.
He was released and will appear at Ringwood Magistrates Court in 2023.
