Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
Location: CA Bay Area
Mentioned: 9 Post(s)
Quoted: 1163 Post(s)
Unless you have handy significant other, you definitely need extended warranty.
Not knowing your location, we don't know what years of E the 35k can buy, but you can go on autotrader and do some research.
Once you narrow MY, you can go to appropriate section here and read common issues in stickies.
Some dealers also post on craigslist.