"Where Does The Power Steering Fluid Go In 1991 Mercedes-Benz 560 SEL?"

Black 1991 Mercedes 560 SEL

I recently bought an used 1991 Mercedes-Benz 560 SEL, and I have no clue where to put the power steering fluid. I correctly identified the brake fluid reservoir, the washer fluid reservoir and the engine coolant tank but I cannot find the power steering fluid reservoir. There is a yellow tank that is marked “Hydraulic Fluid” but it doesn’t explicitly say it’s for power steering fluid and I’m hesitant to put anything in there for fear of screwing up, say, my transmission by contaminating the tank. If anyone has any idea, I’d much appreciate some information here.

Answer: The hydraulic fluid reservoir is for the rear hydropneumatic self-levelling suspension. The power steering pump and reservoir is at the front of the engine. The reservoir is round and metal, the cover is held in place by a single wingnut.