Are you calling me stupid DrJ? I came here for help not to be called stupid. And for my point, you should have known it was a manual because in my first post I said "when I shift into second" so I thought you had known and not just waasting your time. I'm good with cars but have never owned a foreign car so I wanted to know a few things from some benz owners just to be sure. Not representing a good name for the mercedes community for me right now......
Right now all we know is you have a W108 that has a power problem. Have you done anything that has been suggested yet? If you would fill out your profile like we asked, we might suggest a repair shop you can trust, or you might find a member who will meet you face-to-face to help.
I'm not trying to pick a fight, but I'll give you one if you like. I'm trying to help you, and you aren't providing the information that will allow people who know these cars to do that. General questions get general answers. If you'll help us understand exactly the nature of your problem beyond it won't pull hills very well, there might be someone who can give you a precise fix.
It may be you've got a big heavy car with not enough power and you live in a hilly part of the country. We don't know any of that.
You should to think twice about who is and who isn't representing the community. Most people here will help you if you ask a question that has an answer and you give enough information for people to use effectively. I am certainly one of them.
You have been offered a couple of ideas. Have you done what has been suggested, or are you content to continue to search for the magic answer? We don't know--you don't know--we don't have enough information to help you. Help us, and we'll return the favor.
Good luck in finding a solution to the problem.