Did the pump run dry or was the hydraulic reservoir kept full? It's important to not run the expensive tandempump dry, and use the proper MB or Febi hydraulic oil.

If it did not run dry, good, the leveling system is functioning properly also then?

Did you switch the system back on with the switch next to the battery?

I have a spare control unit, I think from the later 4matic as you have, I might also be able to help you with a working rear wiper motor.

The trick will be to troubleshoot your 4matic problem and there are a couple of guys on this forum who can do it, once you catch their attention. Unfortunately (or fortunately) I sold my 4matic about 13years ago, before it started getting expensive so I can not offer much.

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Gone to the dark side

- Jeff