I have a 2011, A160 1500cc, with less that 11,000 miles. The last two days I've had trouble starting the car and there is a rattling sound that appears to come from under the car. The noise is the same whether or not I'm in gear. It's going for it's first service in two days but I'm worried that I might be damaging the engine. The only thing I've checked is the oil level and that's ok.