W123

1984 300 CD Rear Bumper Corrosion

removed the rear bumper and associated rubber trim pieces because the black trim piece running the length of the bumper was loose. Further investigation revealed it's time to conduct some corrosion control on all the metal parts.

Looking inside the bumper one bumper shock has separated from the bumper. I plan to just drill holes and bolt the bumper and shock back together. However, the bumper is severely corroded where the bumper and bumper shock contact, possibly a case of dissimilar metal contact.

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83 300D Transmission Shift Problems ??

Everything on my car works great except the auto trans and I am by passing that problem by shifting manually.
Question to you "am I doing any damage" by not allowing trans to shift automatically?
Right now, 1st gear shifts out quickly below 10mph, 2nd shifts at 18mph with a huge flair and 3rd shifts a little firm.
What I have been doing is keeping 1st in gear until 17mph (high revs)then manually shifting to 2nd and the shift is smooth as can be! Shift into 3rd manually is around 35mph (high revs)also smooth as silk and then we are off to the races and as long as it's in high gear it will run all day without any problem.
What is your take on what I'm doing as far as future problems being created.

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300D persistant knocking noise

I am still trying to track down a baffling noise that one tech has said is a rod knock. The 300D has 117k miles and has had regular service by the M-B dealer where it was purchased. I am the second owner having purchased the car at 116k.

I have now driven the car 1,500 miles half of it on Interstates. Last weekend I did about five miles at 95mph. The noise hasn't changed the oil pressure still pegs above 3 bar at speed and just below 2 at idle.

I keep thinking that if this was a rod bearing it would have gotten much worse by now.

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