W110 W111 W112 Sedan, BENZ AID - COMMON QUESTIONS AND ANSWERS

My mother's 76 300D has started to make a squealing sound when the car is turned. It seems to be temperature sensitive in that it has started and is worse now in the colder weather. It does not squeal when it first leaves the heated garage. My first thought was a loose belt as I had replaced all the belts 2 months ago. I did tighten it, even though it was not very loose. My only experience in pumps going bad is that they start to leak. Can a bad pump start to turn hard and make the belt squeal?

I'm in the process of pulling the heads on my 420 sel, I have everything off and I'm trying to get the heads off the block. Any tricks to remove them. I have at least 2 bent valves from the timing chain rails breaking and the chain jumped 3 teeth on the left head and 5 on the right. Also I think I will pull the timing cover off to replace the chain because there are rail chunks down in the front, cover any good tips for that. thanks Lewis.

We have 83 240d (auto tran) that has less power in 1st-3rd gear than our older worn out 75 240d (manual). Flooring the gas pedal has no results. Hiway performance is fine. Any help is appreciated.

Well, this is amusing. So far I found three different hole sizes. 5 mm, 8 mm, and 10 mm. The 10 mm ones are from mercedessource. Are all three sizes acceptable and which would you recommend based purely on performance?