A search "SLS valve" should give you all the information you need,if these links do not help.

Total SLS Capacity? ANyone know?
Total SLS Capacity? ANyone know?

SLS Valve in 190E 2.3-16v defective ???
http://www.peachparts.com/shopforum/tech-help/106380-sls-valve-190e-2-3-16v-defective.html#post731971

2.3 16V self leveling suspension troubleshoot
http://www.peachparts.com/shopforum/mercedes-benz-performance-paddock/72402-2-3-16v-self-leveling-suspension-troubleshoot.html#post452801

Ups & Downs Of Self Leveling Suspension?
http://www.peachparts.com/shopforum/tech-help/118506-ups-downs-self-leveling-suspension.html#post845940

Self level suspension hose warning
http://www.peachparts.com/shopforum/tech-help/112677-self-level-suspension-hose-warning.html#post795040

Rear leveling suspension
http://www.peachparts.com/shopforum/diesel-discussion/30084-rear-leveling-suspension.html#post162733

Self Leveling Rear Suspension Fluid Replacement
http://www.peachparts.com/shopforum/tech-help/76673-self-leveling-rear-suspension-fluid-replacement.html#post482947

Leveling sustem question
http://www.peachparts.com/shopforum/diesel-discussion/88461-leveling-sustem-question.html#post579948

SLS Spring Conversion Kit Interest?
http://www.peachparts.com/shopforum/diesel-discussion/136632-sls-spring-conversion-kit-interest.html#post1008542

1985 300TD replacement of rear struts
'85 300TD replacement of rear struts

w123 Self-Leveling-System O-ring replacement DIY
w123 Self-Leveling-System O-ring replacement DIY


Strut Installation on '82 TD Wagon: Help
Strut Installation on '82 TD Wagon: Help

123 Wagon Spring Struts-2 Versions-Interchangeable?







self-levelling height adjustment for w123
http://www.peachparts.com/shopforum/tech-help/85061-self-levelling-height-adjustment-w123.html#post551723

re: rear hydraulic on 300td
http://www.peachparts.com/shopforum/diesel-discussion/119721-re-rear-hydraulic-300td.html#post856343

300TD SLS pump removal and suspension conversion
300TD SLS pump removal and suspension conversion

w124 SLS valve on w123 wagon?
http://www.peachparts.com/shopforum/diesel-discussion/147054-w124-sls-valve-w123-wagon.html#post1109181

Help understanding SLS/hydropneumatic
http://www.peachparts.com/shopforum/diesel-discussion/104610-help-understanding-sls-hydropneumatic.html#post718381

Self-Leveling-System - How it works, and troubleshooting the system -
Self-Leveling-System - How it works, and troubleshooting the system

Properly Adjusting your SLS Ride Height -
Properly Adjusting your SLS Ride Height

__________________

Fluid type:
What type of Hydraulic oil goes in the SLS system?

__________________
Robert Fini

'12 ML350 BlueTec, 87k
'06 E320CDI, 270k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 69k
'97 C36AMG, 313k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)