I agree with the above comment on mileage. Low mileage in a 10 year old car is not as important as good maintenance. Mine has 127K miles, and runs and looks like new. I have seen cars with 75K that are much worse.
If you really need low miles, head to Miami and Ft. Lauderdale!! Try www.mercedesshowroom.com.
They seem to have a lot of low mileage SEL's and even a bunch of SEC's. I have never personally visited them, but a good friend has, and reported the cars there are like new! But you will pay lots for them.
Also, try up and down Fairbanks,in Orlando (where you found the last coupe we talked about.)