I have only been driving 240's but I got my eye on a good 740 GLE with B230F and auto transmission in excellent shape with this engine issue, detailed in an email from the owner.
Any ideas?

It has problems re-starting after short amounts
of time. Such as, if you turn it off and try to
re-start it within a few minutes it will sputter and
has a hard time re-starting, and when it does start it
runs rough for a few minutes. However, if you let it
sit for 20 or so minutes, or first thing in the
morning it starts right up. It has no problem
starting after it sits for a while or in the morning.
Other than this issue it runs great. It has a
straight body with no rust! The pictures are very
accurate and it is in excellant condition, it even has
newer tires. It has about 133,000 miles on it. I
purchaced this car from a dealer a year and a half
ago, so I am not sure how many owners it has had. I
havnt brought it to a mechanic, but I have talked to a
few mechanics and they think it may be temp. switch. I
do not feel comfortable driving the car because I am
petite and have a hard time driving it; I just need a
smaller car.

thanks!
webb