1994 Mercedes C280

I am new to this board so excuse me if I don't follow proper proceedures for asking questions.

I am a college student who has finally convinced my parents to buy me a car. I was looking a c280's and was wondering just how many miles I can expect to get out of one? I know it varies with climate and how the car was drivin, but an average estimate would be appreciated, and any other help in buying one.

Thanks
Matt