I don't use LL04 oil in the X5 35d because it has VERY unsatisfactory TBN retention and corresponding high wear numbers, I believe to excess acid buildup. LL04 oil is a typical 229.51 oil. The official Mercedes Operating Fluids website which I keep referring to and keep suggesting you look at gave me the idea to use a 228.5/51 oil in the X5.
Just look at it! It IS an official MB publication! You don't need to be an engineer to understand it. The page I referred to just gives a list of approved oils for, for example, the 642 engine.
Charlie
Just look at it! It IS an official MB publication! You don't need to be an engineer to understand it. The page I referred to just gives a list of approved oils for, for example, the 642 engine.
Charlie