Possible Clues:

• Car, after hesitation, gives way on motorway
• Auto on the autobahn
• 10's friend - one that 10 would like to take out for a spin?
• Audi alternative
• Character in the opera 'Carmen'
• Carmen's friend in car
• CLK55, for one
• This writer gives way after first appearance of racing car
• One's hired Eastern half of attractive location in posh car
• Luxury car biggie