I would appreciate any advice you could give regarding a future purchase of a Mercedes-Benz classic SL, model 107. The car would only be used in the summer months and would probably be washed more than driven. It is a purchase I have always wanted to make. I intend on keeping the car for a number of years and will probably cover no more than 3000 miles per annum. My dilemma is what model to go for? What is the best engine and what do I look for mechanically? Ideally the car would have covered less than 60,000 miles with a full specialist service history. Your advice would be most appreciated. I have up to £18,000 to spend.