Date registered: Dec 2012
Vehicle: '02 E430 4Matic, '14 MB E350 Sport 4Matic, '01 BMW 740i, '16 Golf R, '17 Audi Q7, '10 Chevy Suburban
Mentioned: 0 Post(s)
Quoted: 30 Post(s)
Jeesh.. an old thread resurrected. My 2 cents; There are somethings in this category you will never have 100% assurance on, in which case just go with the OEM spec fluid. When I flushed my PS system, I bought the fluid from Mercedes.. it's called "Gear Oil" on the bottle. Not cheap but not ridiculous either. It was light amber in color and I was happy to put something in that I know was 100% correct for the vehicle. Truth is, there are probably about 50 different hydraulic oils that will "work" in the system. Long term effects are anybody's guess unless you're part of the Benz engineering team that designed the system. Trans fluid has friction modifiers and different chemistry, so I'm assuming the chemistry and additives of the MB spec oil for power steering is different in that regard too.
My BMW specs Dextron for the PS system, so that's what I use. Trans fluid was a long time standard to use for PS systems especially in American cars. There are people that are likely using incorrect spec fluids in their Mercedes for a number of things without issue, for years. Personally, I'd rather not roll the dice on that for a few bucks in savings.