Clear all windows of ice or snow before setting off. Impaired visibility could otherwise endanger yourself and others.
The rear window heating has a high current draw. You should therefore switch it off as soon as the window is clear, as it only switches itself off automatically after between six and seventeen minutes.
If the battery voltage is too low, the rear window heating may switch off.
Make sure that the key is in position 2 in the ignition lock.
button.