The gasket at the front is at the "C" shaped area at the front of the head where the timing chain cover meets the head.
It is a very frequent area for oil leaks, just like at the right rear corner of the head gasket.
This area may or may not have been leaking oil, but it surely has nothing to do with your coolant loss and oil in your coolant reservoir.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".