Is there a quick way to change hydraulic fluid in a '99 E300?

[pcman_jh]

My hydraulic fluid is now at the lower level having probably never been touched since it went on the road in 1999. Rather than just topping up, I'd be up for changing it...

Can I simply syphon the fluid out of the reservoir then fill it with new stuff (I know there will be a degree of cross contamination of old and new), or should a full flush be done, and if so, how - where should it be disconnected etc?

Am I also right in saying this fluid also feeds the rear suspension since it's the estate version I have?

 

[Parrot of Doom]

Syphon it out and refill. I don't think theres a drain for it although I'd be happy to be shown wrong.

New fluid isn't expensive so you could syphon all you can out, refill, and then repeat a few miles later.

I don't know about the rear, others will advise.