Heat from the center vents. Well worth the price of admission

IMO, 126 steering wheel is big yet steering effort is high, 140 steering is one hand light yet stable into triple digits (I have no interest in what the road feels like, that's why I'm in an S); at 250K miles, 126 seats need new pads, 140 seats still pretty comfortable.

Per MB specs 140 has ~5.5" more front and rear shoulder room. Crate dimensions are comparable but 126 greenhouse has more taper. 350SD has a rated highway range of ~600 miles, S350 has a rated highway range of ~740 miles. Maybe drivers with really broad shoulders have really big bladders

You have to drive them to feel the difference then let your preference decide. I got through college putting in fewer hours each evening than I do learning to keep a 140 on the road.

Rule of thumb = each individual MB of a specific year and model costs the same. You either pay for a good car up front or pay what you thought you saved to bring your bargain back to spec. Pay for a good car - you'll enjoy it sooner and longer.

Sixto
93 300SD