Once you get the back off the seat you will see what the deal is.My son had that problem on his 93 300d and was able to get the drive gear snapped back in place and secured with a couple of wire ties. Lubricating the tubes that attach to the head rest to make it slide up and down easily should prevent its breaking again in the near future. My $.02 Don

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Red Green "This is only temporary,Unless it works!"

97 E300D 157000 miles
87 300TD ?141k? miles