What type of power steering fluid does a 1999 Mercedes S420 use?

The 1999 Mercedes S420 typically uses hydraulic Power Steering fluid that meets the specifications of Mercedes-Benz's own fluid, known as CHF 11S (Central Hydraulic Fluid). It's important to use the recommended fluid to ensure proper functioning and longevity of the power steering system. Always check the owner's manual for specific recommendations and consult with a professional if uncertain.