By the way, fwiw, you may have noticed that Arthur Dalton helped me a lot on this thread, and I've noticed he helps a lot of people with CE light problems.
He seems to know enough about these cars, that I'm willing to bet he either is or was a mechanic on these cars.
He also knows what each code number means for each car.
He may be able to provide insight / support for you, as well.
I also recommend you do what I did. I print out pages from this website when there's been a diagonsis that matches my problem and show it to my mechanic. He may be a little insulted, but it's your car, isn't it?
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".