I know what you mean about the Volvo -- my 740 is laid up at the moment with a no-start problem (probably injection pump, it's the diesel). IF you can find a diesel, and the engine is in good shape, these are really the cat's meow. A bit slow off the line, but the 5-speed manual does 0-60 in 8.5 sec! A dream to drive, too, and those seats.....

I love my 300D to (and the 280 and the TE....),but really prefer the Volvo for highway trips.

Anyway, heated seats can be retrofitted, you must need the heater strips and switches. Don't know exactly what models they were available on, but I do know the W126 had them, either driver's only or both front seats.

Slow windows need some dry silicone lube in the channels. Wax may work too, but will cause trouble with streaks on the window glass. Occasoinally the regulator will get stiff, too, from disuse.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!