Beagle,

Thanks for your reply.

I have a 1976 W115 300D with the 617.910 engine - you are describing a 1977 W123 300D (617.912 engine). I don't know the extent of the overlap when it comes to heat shields and injectors, but I wouldn't be surprised if they used the same equipment. Do you know?

Nonetheless, my basic question remains the same - if everything works properly and there is no leakage, is it a good idea to leave what I've done (new shields on top of old seals) alone?

The car has never run better than it does right now.

Robert