Jim B. is right. Diesels always hold their value better than gas cars and are always on the demand. Pre-Purchase Inspection is crucial when buying a used Mercedes as you get somewhat of an idea what you're getting yourself into. They are worth $100.00 to $250.00 prices by far. I've saved so many people from buying migraines with these Mercedes by these inspections. Every year had different issues. Remember that. So best to do your research and see what you can handle. Maybe a nice E350 will suit your needs since it might be more in your budget? By the way, I drove a 1987 300E for 15 years too. I did the head work myself, including the machine and installing a piston and rebuilt trans. By the time I drove it up to 215K miles the Camshaft was worn a bit, but I still sold it $3200.00 and I work on it to this day.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k