A friend of mine claims that MBZ seats are about as comfortable as a piece of plywood on top of some springs. And he's probably right.

IMHO, stock MBZ seats in the W123s will never be anywhere near as comfortable as say, the seats in a Maxima or even some pieces of Detriot iron. They definitely take some getting used to....

For example, the driver's seat in my '83 TD is shot; its sagging to one side and at least 50% the springs are broken. Surprisingly, it's not bad to sit in...even for long periods of time (I once drove Marlene 1200+ miles in a day without painkillers or sedation). But, to me, the TD's motion is also much smoother than the sedan or, maybe I'm just used to it now.

OTOH, the seats in SWMBO's '84 300D are in almost perfect condition. They are relatively comfortable for short trips but if I hit the road for an hour in it, I guarantee my butt will be numb. The only thing that seems to help is to move the seat all the way forward on it's 'lifting' rails and then adjust the fore and aft position. That way, all of my thigh is supported and my tushy isn't quite so 'point-loaded'.

And, strangely enough, the back seat in the 300D is one of the most comfortable seats I've ever been in.

For sometime this fall, the project is to rebuild the TDs seats by installing replacement pads and new leather covers....maybe I'll even 'spring' (pun intended) for a new seat base. But, while I have them apart, I'm going to try and build up some lumbar support in the back and add in some high density foam padding on top of that horsehair. Hopefully, it will alleviate some of that 'board on a spring' aspect that has such a numbing effect on my derriere.

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Never a dull moment at Berry Hill Farm.