Date registered: May 2005
Vehicle: '07 GL320CDI
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
It's a very specific hydraulic fluid you can probably only get at a Mercedes dealer.
You can also online, of course.
Your rear "shocks" are not shocks but instead are load levelers, and your power steering pump has a second section that pumps this fluid to those load levelers to raise and level the rear end when weight is added. (I did NOT just say the fluid is power steering fluid.)
Of course since your reservoir is empty, filling it will most likely enable you to find where the leak is. You may also get a clue whether the pump has survived running dry.