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Old 01-02-2004, 08:38 PM
Paulwho Paulwho is offline
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Join Date: Dec 2003
Location: Rogersville, Missouri
Posts: 104
40-310 is checking the adjustment of the rear level control valve. This is system is on a few specific models such as the 560SEL
Some info on your car would be helpful for you may not have this system.

In a nut shell the base weight of the vehicle is carried by the springs and then the hydraulics assist when weight is add to the vehicle. Unladen a 4 mm rod should slide through the level control valve arm and into a 4mm recess in the valve housing.
1987 190E-16v, 1988 260E Gone after 19 years of service,
2006 C280 4MATIC for the Wife
2006 OM647 Dodge (Mercedes) Sprinter with wheelchair access for my#2 Son
21 years Mercede-Benz Technician, Master Technician/Master Wrench
Master Guild Technician once/ SLR Technician
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