Thanks for the photo.

The switchover valves (white plastic/nylon with two sliding fingers) are under the large black plastic dust cap which you can see on the valve cover in your picture. You can see three hoses going to a connector on the valve cover. Just behind this connector (but hidden by the black cap) are the switchover valves. The little black rubber molded hoses I'm asking about are attached to the two sides of the switchover valves. Mine are all mixed up; can anyone help me with the correct hook up for these hoses?

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1972 450SL
1982 300D Turbo