No, the M104 motor was infamous for having the notorious head gasket failure (because the two different metals they used for the bottom vs the top engine apparently expanded under heat at different values/rates, thus ruining the gasket)...

Head gasket can be seen easily with hood open (atleast the passenger side one) and it looks a-okay. Also, doesn't leak a drop of oil, never has! Burns about a quart of synthetic every 5k miles- it's actually a nice "refresher."

I will atleast investigate further on your suggestion. Thank you.

Additionally, haven't noticed any oil in the cooland/water and by how well the engine performs, I doubt there's any water in the oil. ?

Thanks again!

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)