idle speed

Hi, New poster here so apologies if i'm posting in the wrong section. Over a month ago I took ownership of a 1992 Mercedes 190E 1.8 with 64k miles on the clock. She's been well looked after and garaged her whole life. Everything has been fine except she has odd startup behaviour and i'm...

Hi, I have an 11 registered ML 350CDi, bought from main dealer just over a month ago. I've noticed it idles at different speeds. Nothing to do with engine being cold or warm. When the engine is warm sometimes it idles at around 7 and sometimes around 9. What should the 'normal' idle be? Is...