I have an 1986 300E and the dealer estimated $2000 labor and parts to repair the sunroof. None of the local indies were interested so I fixed the sunroof myself. In most cases its not really that difficult, it takes time and patience. Also it helps if you are limber enough to work inside the trunk.

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'86 300E 5 speed
'71 Triumph TR6
'46 Cushman Scooter
'41 Ford 9N tractor