loubapache, Yes MB HAD used ATF in power steering systems when DEXTRON was DEXTRON, but DEXTRON is now Dextron2 or 3
& the stuff that is used to allow the fluid to work in combination with MERCON can be damaging to power steering systems. NOW MB only recommends P/S fluid!
Unless of course you have the older fluid W/O MERCON. Or ATF type "A" suffix!
Just don't use DEXTRON with MERCON!!

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MERCEDES Benz Master Guild Technician (6 TIMES)
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1986 190E 2.3 16V 2.5 (sold)
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