I have sold the S500 long ago and replaced it with a 745i which I thoroughly enjoyed. I am now considering going back to MB, possibly for a 2004 SL500 with 79k miles (1 owner). My question is can I rely on a car with those specs to last me a couple years as a daily driver or should I go with a '04 BMW 645ci instead? I was hoping to find out if anyone has experienced issues with their SL of nearly 10 years and what I should expect to run into? Thanks!