Yes, you can do it. I thought my vacuum line was plugged, cleaned it out, reinstalled it, but a week later, the CE light came on again, so I went ahead and replaced the part.
I think Arthur Dalton posted that the part was updated, anyway.
Fastlane is a great place to buy the part.
Whether you or your mechanic does it, it shouldn't take less than 30 minutes, so it's not an expensive job.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".