Thinking of buying audi a3 sportback 2lt tdi 66plate. £10985. 55k on the clock. But when I've checked the service history. It's had 2 service/inspection (oil change) last one @15k miles within 2 years the car has done 40k with no other proof of a service. The garage are saying its had a life long service. It doesn't state this on the service report though. Plus it should of been changed at 20k Should I buy or run.