My bro in law's S500 is for sale. I'm sort of interested...

The good:
drives well and tracks nicely
about 98000miles original
new winter and summer tires
mostly serviced at MB dealership
good cosmetics

The bad:
Last fall was found with dead battery - recharged and seems OK now
During last cold spell was found sitting on bump stops - would not come up,
with outdoor temps up now, suspension came back up and seems OK
The Nav and rear seat DVD player not working
Various light bulb warnings come and go
Noticed strut tops have cracks...

What's it worth?

PS.My cars have never seen a mechanic...I do all work on my own.