Thanks to all of your advice, I bought two new accumulators, and installed
them last night. The change in the ride is remarkable, making me wonder
just what the state of them has been for some time. It appears that the
rear shocks are undamaged, hallelujah!
If you don't mind a couple of hours underneath the car, this is a
relatively easy job.
You will absolutely need an 11mm line wrench - I bought some Craftsmans
for this and future jobs. Speaking of the 11mm fitting, do NOT re-attach
this until the nut that is directly underneath it has been tightened! You
will find that to get this nut off (with a socket, anyway) you will need to
undo the 11mm fitting. So, to get it back on, you should do it before
re-attaching that fitting. Makes sense, but I forgot and it wasn't fun.
The 17mm fitting may come off easily (one did) or it might not. There is
another fitting down that line (also 177mm, I think, but you'll need an
open end) that should easily come off if you are worried about damaging
Bleeding the hydraulic line was accomplished by the use of the bleeder
fitting on the valve. However, since the accumulators were filled with
oil as a result of the failure of the diaphragms, I was bathed anyway once
I took off the fittings. Having a few cups of kitty litter handy will
probably help, along with lots of shop towels.
After some research out there, I went to the local airport and got some
"5606 fluid" for about $6 per quart. Using the bleeder valve to flush the
system required a couple more trips underneath, but did the job PDQ. Since
the pump feeds from underneath the Hydraulic container, I just pumped until
the bottom was mostly visible, then poured in a couple quarts of the new
fluid and kept bleeding. The 5060 is red, so it was easy to see when the
old fluid was flushed.
Also, you CAN tell if your accumulators are bad. Visually, the new ones
had a metal piece that was pushed up all the way to the outlet. The old
ones did not. I also gently inserted a screwdriver into the old ones, and
it went to the bottom. Obviously, on the new ones, it didnt' go in at
Thanks again to all - maybe some of this will help the next one.
Message posted using http://www.talkaboutautos.com/group/alt.auto.mercedes /
More information at http://www.talkaboutautos.com/faq.html