500 sel idle
Great car by the way. We had one of the very first 500 SEL in the US. Loved that car...ROCK solid!
(Jeez…)
You may have replaced the vacuum lines (good) but there still may be an air leak. The idle control valve may need to be cleaned or replaced, or a new idle control unit (fixed my high idle). Less likely but possible is leaking injector seals or worn injectors.



