Lifetime Premium Member
Date registered: May 2006
Vehicle: 2001 E320 - Brilliant Silver/Ash: 107,000+
Location: West Virginia, USA
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Quoted: 5 Post(s)
The last I heard, all the MBUSA dealers are going back to the fully synthetic Mobil1 0W40 (MB spec 229.5). As Colt45 GTO wrote, they were using Mobil1 5W40 ESP Formula M (MB spec 229.51) for a while, but the bottle I have says fully synthetic. That is now only required for the newest BlueTec diesels. There are other MB-approved engine oils, just make sure they say 229.5 or 229.51 on the label. If your car has the FSS (flexible service system) you should use a fleece filter.
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