Hi there,

Which fluid should be used in the hydraulic boost/power steering system on my recently purchased 1988 635CSI? It's a late September/88 build. The original user's manual in German only mention "ATF" and "your BMW-dealer knows what grade to use".It's a little confusing, as the fluid in the reservoir is yellow/amber (slightly dirty looking), and does not look like Dexron II. The car is a low mileage- one owner example, and always serviced at the very same BMW-dealer where originally purchased from in 1988, so the fluid would be "dealer serviced", I suppose.Would Dexron II grade ATF be colored yellow/amber, or is it always red?Can anybody help, which oil should I use?

Please help

I didn't find the right solution from the internet.

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