found my own answer elsewhere. Dot 4. I hope that helps someone else...
Any DOT 4 brake fluid. OEM specs.
All Mercedes model cars should only use synthetic DOT4 brake fluid
When refilling brake fluid it is important to use the correct type of fluid for the car. For a 1995 Toyota Corolla the correct fluid is brake fluid dot 3 or brake fluid dot 4.
What is the correct power steering fluid for a 2006 Mercedes E350 4matic?
brake fluid or diesel
No, and neither has anything to do with the engine type.
DOT 3 brake fluid.
as long as the DOT rating of brake fluid is the same as the existing brake fluid, it will not matter what brand u use
read the owners manual
See this, link its quit nearing your question I guess as i am using the same fluid for my vehicle also. http://www.autosparepartsusa.com/Getproduct.aspx?modelid=300SE&partid=242592&catname=Brake~Fluid&find=1&make=63&year=1988
Astras usually share brake fluid with the clutch fluid resiviour
To top off the brake fluid on the Renault Kangaroo diesel, you will need to open the brake fluid reservoir. This is located on the passenger side of the motor nearest the firewall. Open the reservoir and add fluid.