Hey All,
91' R129 (300SL-24) w/ M104.981, 99K miles.
About a month ago I changed my oil from a "cheap" non brand full synthetic 5W-30 to MB 229.5 5W-40 full syn oil along with an MB original filter. At the first cold start after the oil change, I noticed a Knock that will disappear after 3-5 seconds and is not present after. (as oil pressure builds up). I then changed my oil, this time using the Chevron-Delo 400 15w-40 (along with an MB original filter). The knock is still present.
Oil pressure readings:
Cold idle - "3"
Warm idle - "2"
Light acceleration - a tick below "3"
Harder acceleration - "3"
No other drivability issues whatsoever.
My driving style is the complete opposite from the italian tune up - which I was told to try..
I'm desperate to get rid of that knock which simply - was never there before!

some videos..
The cold start noise

idling

Thanks