I am thinking of buying a SL. Don't know anything about them apart from they look very nice. Can anyone advise me which one to buy, age, engine size, milage etc. I have never driven a sporty car before and it will be my commuting car, only 20 miles day though. I have also no idea about servicing, how often? how expenisive and what to look out for when buying one with regards to this. Any advise gratefully appreciated.