Should I replace my 300E 2.6 w/215,000, that might need a good $2,000 to keep running over next 12-18 months, or pick up a 2001, E320 w/56,000 for $15,000?

Option 1. I have a well maintained 300E 2.6, Have put new alternator, radiator,water pump, a relay, few other things in past 18 months, about $2,500 worth of repairs. Will need some front end work; and possibly head gasket. Fuel pump, starter, original.

Option 2. E320, 2001, orig. owner, 56,000 miles. for $15,500. Looks and runs great.

what would you do?