Aside from engine OIL leaking all over the place, what other issues can I expect when I have a Head Gasket leaking (front & back) on an M103 Engine?

- oil leaking...
- compression issue?
- other performance issues?

REPAIR COSTS:
$2300? (remove/machine/replace gasket/all labor) - reasonable?

thanks in advance!

Kieran-

__________________
Kieran K
Jersey Shore
1988 300CE (for sale, AUG. 2013)
1995 SL320 (88K) - terrific car
1983 300CD
-1993 400E (sold w/74k)
-1988 560SEL (sold w/49k)
- 1995 S420 (sold w/75k)
- 2005 E320 CDI (sold)
- 2007 E350 4M (sold)
- 1984 300D, sold w/305k, CA car, zero rust & over $12k invested
- 2001 E55 AMG (sold w/81k), I really miss it.
- 1982 300CD (sold, all stripped down)