It's me again, and thanks to you, I've got my climate control questions addressed.
Yes, I too have heard that the M110 engine tends to be rather noisy. The "noise" in question, I believe, comes from the "tappets", and sounds like a "tapping" noise. Definitely not the timing chain. Apart from generating noises, what other symtoms do faulty cams/rocker arms exhibit? If the rocker arm job is not too major an undertaking, then I may consider replacing them.
So perhaps I should have a compression test done, am I right Steve? Ok, shall do that, and from there I'll determine the fuel consumption issue.
In summary, can I suppose that the above measures should be adequate for the moment?
Thanks again Steve!
1983 W126 (280SEL)