- Buick Ownership
- Regal TourX
I thought this full syn might work for you, if you have no particulate filter on your MB.Amazon has Shell Rottella T6 5w-40 for $20 per Gal. Appears to meet mb228.31.
Does your vvehicle have a PF?
Looked like diference in spec was if PF equipped or not, but I am not up on MB's and/or diesels.
PS your first post said 5w-40 then you said something about 0w-40 so not sure which you want.