This is some old-school KZfaq. Just a little slice of life.

When Mercedes built cars thst were reliable

I used to have a w123 300D with 450k miles before the rust finally got to her. Such a good car

Thanks I have the same car 1990 560 sel white. Need help with SLS pump to get the pump resealed. I have the kit. I wish someone knew how?

just FYI, octane numbers are measured differently in the USA vs europe. Europe uses RON or the "Research Octane Number" which is measured by running an engine under controlled conditions. In contrast the US uses the AKI or "Anti-Knock Index" which is an average of the RON and MON, the "Motor Octane Number" which uses a similar test engine to RON, but operates it under different standardized conditions. Roughly speaking: 87 AKI = 91 RON 91 AKI = 93 RON 93 AKI = 98 RON 100 AKI = 104 RON 104 AKI = 108 RON not sure if this is whats going on or not, but you sound like you are from europe so you may think all USA gas is low octane and you have to pay a premium to get the stuff you get in europe. not true.