Repair or restore an E34 M5 self-leveling suspension?

[BMWM5E343.6]

Hello, Thank you for your answer but the shock absorbers are new. The hydraulic return line vibrates and when you touch it with your hand you feel small shocks which increase with the speed of the engine.I don't want to delete the sls but what to do?

[shogun]

Are the feed and return lines all original or did you ask a hydraulic shop to repair them? Because in some lines are flow restrictors/regulators http://bmwfans.info/parts-catalog/E3..._tubing_front/
for example #10 , in the middle of the hydraulic hose is a crimp sleeve, that holds a flow regulator/restrictor inside the hydraulic hose https://www.turnermotorsport.com/p-6...uine-bmw-part/
here a pic of the flow restrictor from my E36 M3 power steering
https://i27.photobucket.com/albums/c...1E583010D5.jpg
https://i27.photobucket.com/albums/c...1E6D6C94E5.jpg
https://i27.photobucket.com/albums/c...1E9F78E397.jpg

[BMWM5E343.6]

Exactly, my problem is that part n°10 has one day been replaced by a pipe without a restrictor. This pipe is now impossible to find as an original part (I searched all over the world). All other hoses in the hydraulic line are original. I have also looked on the M5board forum and some people have had the same problem and remove all the flow restrictors and even drill a bigger hole at the pump outlet to increase the output flow to the suspensions.
What I don't understand is that they just do the opposite. they increase the flow while for me it should be reduced.
What to do to do well.

[shogun]

seems to be M5 specific, here are pics of the enlarged banjo bolt etc https://www.bimmerforums.com/forum/s...ng-SLS-testing

[BMWM5E343.6]

I remain at an impasse for the moment because I do not know what to do to do well, but I really wanted to say thank you for answering me. Anyway, I'm a BMW enthusiast (M3 E36 and E46 too) with a lot of technical knowledge about these vehicles. If one day you need technical information, I would be happy to help you in turn.