I'm currently looking to buy either an A5 or S5. In either my preference is petrol & a slight preference for automatic at present but not too fussed about auto or manual. I'm a low mileage driver, probably only doing something in the region of 4k per year. If buying the A5 I'd be looking at the s line or black edition & would probably want something no older than 2 years. Ideally I'd be trying for low Â£20's but up to mid Â£20's. If buying the S5 I'll be looking around the Â£30k mark & so will probably be looking at something close to 3 years old. If i kept for 3-5 years what sort of maintenance issues am i likely to have as the car approaches 8 years old & what sort of costs are these likely to incur? What is peoples advice / preference when buying? If i set a budget of say Â£30k, what is your preference, buy an older version of the higher spec car (ie the S5) or buy a newer version of the lower spec car (ie the A5)? Is there much difference between repair & servicing costs of the A5 & S5? Is there anything in particular that I should look at / ask when viewing either of these cars? Any particular maintenance issues people have had with these cars? Any advice / assistance would be much appreciated.