Is the sl500 reliable?
Yes. Just expensive to maintain.
Heres all the info and owners reviews in one place: http://www.edmunds.com/mercedes-benz/sl-class/2005/?sub=convertible&ps=used
SL's from all years are absolutely fun to drive cars. However, they can be very expensive to maintain. You can find 20yr models that the owners just did normal service on and never had a problem. Then there are fairly new models that have just eaten an owners bank account up. The ones that are driven regularly and have been maintained well (oil, brake and transmission fluid changes) seem to be the most trouble free - regardless of age and mileage. The local MB dealer says the most expensive repairs come from SL's that have been driven very little and sit for long periods of time. An MB product is built to be run every day.
I have since 2012, no problems yet. Has 141,000 miles, weekend warrior!
Looking for a Used SL-Class in your area?
CarGurus has 3,116 nationwide SL-Class listings starting at $4,000.
Search Mercedes-Benz SL-Class Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Mercedes-Benz SL-Class Experts