Hi, Welcome. I have a '89 300E. I am 6'1". I have found the seats to be infinitely adjustable. I have at least 4 or 5 inches of head clearance in the low position. My experience is that electrical seats are much more friendy to tall folks than mechanical seats.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.