hello, i bought an 85 240 from the original owners. it seems to be in great shape. this is my first volvo and a complete bargain for 0, they just bought a brand new volvo and wanted this one off of their hands. What can i do to ensure the longevity of this car. Any extra pampering needed to certain parts, systems? what seems to be the most common problem and how can i prevent it? thank you all in advance! amy