 I have had nothing but problems with my 2000 Mitsubishi Diamante.  The last one is the famous heater core leakage problem.  Just google for "Diamante heatercore" and you will see It is a known problem and Mitsubishi knows about it but is not doing anything. This problem costs $700 - $900 to repair or you will be poisoned inhaling antifreeze.  Also, the 60,000 mile service costs $1,500 for a car not worth even $9,000.  I will never purchase a Mitsuibishi again.