You want to give up the social part of college life to buy a used MB? Bad move and you will regret it.

Fancy car+living at home= uncool.

Keep your old SD, go live in the dorm and have a great time. Good luck with your studies.

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E