My A4 has covered 56000 miles from new, former company car doing about 16k per annum, now as 2nd owner I only do about 7k per annum. First reg. Sept 2006 petrol 2 ltr automatic. Car has always been seviced at Audi Main dealership, and I have just had the oil and filter change plus brake fluid change. I would like to know when would this car require new cambelt? I have been told 70k petrol and 90k for diesel engine.