Originally Posted by Jim H

1. OK

2. NOT TRUE! Diesels emit CO. Incomplete combustion in both diesel and gasoline forms CO. Newer gasoline engines have catalytic converters that lower the CO levels, older diesels do not have not such assistance. The same rules for keeping snow clear of the tailpipe and ventilation in the passenger compartment apply.

3. 4-ways are OK, but she can also use the left or right Parking light position (1 or 2 clicks from the 'other side' of OFF) if the car has them. Euro design provides these 'extra' switch positions to act as marker lights for cars parked (or stranded) on the road side.

In the US this feature usually confuses us, and leads to a dead battery when we turn the switch all the way counter-clockwise to what we think is the OFF position and don't notice the lamps...