Current Oil Viscosity Recommendations?

[jcyuhn]

Gawd, I hate to risk starting an oil thread, but here goes.

I don't have any recent MB data sheets. What is the current recommendation for oil viscosity for the M104 engine? The older data sheets I have seen recommend 10w-40, 15w-40, 20w-50 for different climates. But when I have the dealer service my M112 engined car (hey, it's included in the cost of the car...) they use exclusively Mobil 1 0w-40. So does this latest recommended oil also apply to the m104? BTW, I noticed while browsing at the McParts store that M1 0w-40 does not carry the energy conserving starburst symbol - interesting.

Please note that I'm not asking your opinion on which oil or which brand of oil to use, I want to know which viscosities MB currently recommends for the m104. I'm in the DFW metrmess, so need to deal with a temperature range of perhaps 15F during the winter to 105F during the summer.

Thx,

- JimY