Most car owners have experienced that sinking feeling when the mechanic at the garage starts rubbing his – or her – chin and looking serious and sorrowful. If they suck in air through their teeth, the sinking feeling can soon become completely disorienting. No matter that you thought you were going in with a small problem. That expression tells you it’s probably going to cost you a lot more than you thought. A lot more. So it probably comes as no surprise to find that, according to research from garage scheme Trust My Garage, the average British motorist forked out hundreds of pounds to repair whining engines and wonky wheels and patch-up scrapes and dents last year. Almost two thirds (64%) of the drivers who responded to its poll paid out up to £500 for unexpected car repair bills in 2013.