Got a late model power seat at the junkyard for my 1985 190D, which has manual seats. I'd like to keep it manual and I'm told the bases can be swapped (having some trouble there) but what about the backrest?
Of somewhat lesser importance, I found some W126 leather seats that I want for my W123, however they are electric (with heat). Is there any interchange between W123 and W126 seats or should I be looking in the Euro market?

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1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950