Hi Folks..i Am A Proud New Mercedes Family Member..i Have A Beauty 1988 300se W126 Model..straight Line 6 ..gas Model...black On Black, Its Quite A Car...!!....i Have A Question..mine Runs Like A Top And Drives Great....when I Finally Got To Drive It On A Freeway, I Noticed That At 70mph The Rpm Is Around 3700 Or 3800..or Close To That...is It Supposed To Kick Down To A Lower Rpm At High Speeds Or Do They Run This Way On Purpose..?..that Seems Kinda High To Me, But I Dont Know A Lot About These Cars Yet....what Rpm Should I Expect To See At 80mph..?..thanks For Your Help