I want to temporarily swap a 123 seat into a 126 so I can work on the 126 seat and still drive the car. If this were a permanent thing, I wouldn't mind having to swap rails, but if I can just bolt it in that would be great. Both are '84. Will it work without swapping rails or will I have to drill? Doesn't _really_ matter, cuz I'll do what is needed. Just want to know in advance what I'm up against.

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mjk

'84 300SD 119KMi (Liesl der Diesel)
'84 300D 326KMi when the oil left (former parts car)
'82 300SD 253KMi (new parts car)