power steering fluid on 2005 Mercedes-Benz E500

What kind of power steering fluid should i use for my MB 2005 E500? Can i use any regular one or it should be only Mercedes brand?

Asked by for the 2005 Mercedes-Benz E500
Do not use regular power steering fluid!
All Model 171, 203, 209, 211, 215, 219, 220, 221 and 230 Power Steering Fluid - Pentosin CHF 11S

All of the above mentioned model vehicles must use power steering fluid Pentosin CHF 11S (MB part no. BQ 1320001).

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