Prior to adding any fluid, the inside of the power steering reservoir was cleaned. An insignificant amount of soot was found on the base plate.
Normally I would remove the power steering reservoir for a thorough cleaning, but it could only be removed by cutting the Oetiker Stepless Ear Clamp on the return hose (not visible - behind the hose to the power steering pump). The hose to the power steering pump has a screw clamp as can be seen.
Fill the power steering fluid reservoir to within an inch of the top with Pentosin CHF 202.
Reinstall the DME relay and start the engine for 5 seconds while rotating the steering wheel back and forth. Refill the power steering reservoir and repeat this step, this time letting the engine run while turning the steering wheel fully to each end a few times.
Check the power steering fluid level in the reservoir and top up as necessary.
If at any time the power steering pump is sucking air, shut the engine off and add power steering fluid.
Check for leaks at the hydraulic fittings at the steering rack.
Reinstall the underbelly cover and reconfirm the level of the power steering fluid.