The A-Class Mercedes was becoming a strong favourite for my new car. I had another drive last Saturday and really liked it. And then I found that, not only did it not have a spare wheel, but it also didn't even have a place where one should go. The MB guy said that it comes with run-flat tyres, so it didn't need one. I wasn't convinced, so the A-Class dropped from pole position to the back of the grid. Everyone else offers a space-saver as an option, except (I think) BMW, but then I was never going to buy a BMW anyway. From what I've read, run-flats are not the most brilliant of ideas, in that, if the car's suspension is set up for their characteristics, you can never use any other type of tyre. Has anyone any experience of them?