Something has been bothering me for years since we bought the 2003 E320. The fact that it has no dipstick. What if the computer is wrong, or the oil level sensor fails?

Yesterday I changed the oil myself and measured the old oil in several empty quart bottles that I've been saving just for this project.

The E300 and the S420 both had dipsticks and if I remember correctly the low mark was 2 quarts, not 1.

I have let the computer in the E320 tell me if the oil level is low but always displays, "Oil Level OK." Personally, I want to see the dipstick.

When I drained the old oil yesterday I got out 7.5 quarts. The Mercedes book says the capacity is 8.5 quarts.

Shouldn't have the computer told me I was 1 quart low?

Or is the low mark in the E320 computer at 2 quarts like the old dipsticks marks were?

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1998 Land Rover Range Rover 66K Miles
1988 300SE Totaled in 1998, hit by drunk driver, but we walked away OK
1989 420SEL 140,000, just warming up. Total by 18 wheel gas truck rear ended, but refused to lose another MB. Had it repaired cost $10,000+ Great Car again SOLD it for a 2003 C320 to save on gas
1991 2500 Suburban 454, 130,000, Best truck in the world. SOLD it out right.
1952 8N Tractor 1,000,000-/+