Mercedes do not sound like a car from the 60's

Spoiler alert: This episode where the BRAND NEW Mercedes all of a sudden breaks down after the woman wants to take a taxi is beyond unrealistic. The sound the car was making when he was trying to start it back up is not a sound cars have made in over 30-40 years. I know this is not a true story; but don't take a brand new Mercedes; or actually ANY NEW CAR and try to make it sound like it has a carburetor and it can't start. It really messes up the continuity of any story; unless it's some show from the 60's; which this is not,.