2006 Mercedes-Benz S500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2006 Mercedes-Benz S500
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2006 Mercedes-Benz S500 ProblemsActive Body Control System Can Leak Hydraulic Fluid
The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too low and cause damage to the undercarriage.
The Mercedes Benz S500 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers.
On the back of the cylinder heads there are three, in total, plastic expansion plugs that plug access ports to the camshafts. These plugs are well known for seeping oil, and leaking if left unattended. The oil will run down the back of the engine and eventually make it to the ground.
Replacement of these three plastic plugs is extremely simple, and should be done as regular maintenance. The recommended interval for replacement is every 60,000 miles.
Problems with the pneumatic system can cause closing assist and door lock issues.
2006 Mercedes-Benz S500 Questionshow to find if automatic trunk assistance pump is bad or leak in system? (1 answer)
I have a 2006 Mercedes S500 doors nor trunk responding to key or door switch lock and unlock command. Head rest non responsive also. Automatic trunk assist pump in trunk has fluid but makes no sound while pressing button on key or trunks manual open button. How do I find and fix this problem?
Trunk opens normally with key fob or door switch but only stays open for 5 to 10 seconds then closes on its own. First reasonably slow/soft then quite firmly when the trunk assist engages.
locks on all doors are functional,key fob works on all doors but right rear will not open.