I too own a W108 250SE Mercedes Sedan although mine is a 1966 model.
I actually have three of them, two I purchased as parts cars, one is a 1967 250SE and the other a 1968 280SE.
My main car is actually a manual, the others are all autos, the manual or stick shift, are a lot harder to find in this country.
Anyhow I have gone halves with a friend and we are using the car as a Sprint car for regularity events at our local race track, called Mallala here in South Australia.
We had our first meeting a few weeks ago and the car ran like a dream.
I have to say that I really like driving it as it’s the closest thing in feel to a Pagoda that you will find.
You can see some footage of our 250SE on YouTube here:
http://au.youtube.com/watch?v=usYNbykTQGQThe next steps are to lower the car (as it is riding very high even from standard), and play with shockers and sway bars.
We are not looking to make a racing car out of it. Just a nice car to enjoy on the track occasionally.
This car is very rust free and in overall pretty good condition.
I love my Pagoda, and with this car I can still have that feel when driving more friends around.
Yours looks good in the photo’s and if I was on the same continent as you I would be happy to let you have some parts that you are after. Let me know if you get desperate and maybe we can work something out.
All the best to you and your new project car!
Regards
PC