1991 Mercedes-Benz 300TE 4MATIC Q&A

1991 Mercedes-Benz 300TE 4MATIC Question: I have a hydraulic leak above the cross member. Should I still drive it?

I don't want to burn up the pump. What should I unplug? The guy I got the car from said he replaced an o-ring in a sending unit above the cross member and it stop[ped the leak for about a year. Any idea what part he is talking about? I want to order a new part, not another o-ring, before I jack up the car and remove the cross member. -
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