The future of Oz carmaking giant Holden is again under darkening clouds after senior Govt ministers told reporters that parent company General Motors had decided to pull out of Australia.

The AA warns that closed up vehicles can become "sweatboxes'' in a matter of minutes after a blistering weekend where the AA rescued three babies from locked vehicles.

An Auckland car salesman has been fined for placing fake bids on 405 online car auctions in an attempt to up the sale prices.