W211 E320 cdi makes horrible shutter when put in reverse

C4veman

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Your Mercedes
2004 W211 E320CDI
My W211 E320 CDI suddenlymakes a horrible vibration/shutter noise when I put my car into reverse.
My shop told me brain of 722.6 is bad. I replaced brain with new rebuild one with new solenoids and conducterplate.

Checked pan and old oil for contamination but pan and magnet looked clean.
Put everything back togheter with original oil and new seal and plug.

Checked oil level with stick but problem is still here.

What could this be?

I also noticed that starting engine and stopping engine create a bad vibration.
Upon further checking I also noticed that my flexdisks don't look ok?
 
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