The C-class wasn't introduced to the states until 1994, and it was the C230 IIRC. There was no "240" engine in 1993. I would pass, since either this guy has NO clue what he is talking about, or is simply lying. There will be more. In my local craigslist, you can usually find a decent set within a couple weeks, seen as low as 75 bucks for a 4.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth