Thanks Ali
You answered my question with what I expected.
Most likely there is no special break in oil. The term is just often used by lay people to point out the oil is origional and has not been changed.
-- On another note regarding oil.
I am the 2nd owner of my ML320.
The 1st owner told me he added a quart of oil every 1,000 miles or so since new.
When I got it at 90,000 miles - -(6,000 miles since last oil change) it went thru a quart every 700 miles.
Then I changed it 2,000 miles ago and the oil level is fine with no adding of Mobil One.
The only things I have done is...
1) cleaned the EGR Tube
2) as mentioned changed the oil
3) used Mystery oil in my gas
4) I use Mobil Premium Gas. Previous owner said it took Regular Gas. (so 90,000 miles on the wrong octang)
It's a mystery to me why the oil consumption went way down.

__________________
Steve Danville
what i did myself.
CPS
rear shocks
MAS x 3.
SparkPlugs (twice)
Fuel pump & Filter
Window switch
replaced both failed horns with Honda horns.
Cleaned ERG Tube
Oil changes
Oil consumption Fix
Brake Pads
A/C Recharge
Anti-Freeze change X 2.
Front Shocks. Monroe. $90
Mercedes Warrenty Work:
Harmonic balancer,power steering clamp. Cat converters.Drive Shaft Bearing.s
Replaced Outer Lower Tie Rods and front lower ball joints at 156,000 miles