oill grade for a MB "smart" turbo diesel
 

Because my new MB "smart" won't arrive for another two months, I don't have an owner's manual yet. However, I have an opportunity to purchase 20 litres of high quality synthetic oil at a bargain price. I use 15W50 in my other two MBs. Does anyone know what grade is recommended for the "smart" turbo diesel?

There is a Smart Car discussion group over at MBCanada.com. 15W50 sounds like it would be heavier than what modern diesel engines would call for. I bet they are suggesting 5W40 or 0W40.

I believe this may answer your questions:
http://www.whnet.com/4x4/oil.html
Scroll down to the bottom, M-B Spec. 229.5 oil. ;)