The morning start from cold takes 4 to 6 tries - severe on the starter motor. Yet for 4 - 6 weeks at a time it starts perfectly and idles at 900rpm to 1100rpm,then drives and starts perfectly all day. But for next 5 to 7 weeks it goes back to this difficult start. When WD40 is sprayed in under air cleaner body [ to reach the cold start valve ] it seems to work about 50 % of the time, and for a few days. Recently again the engine has cut out when parking, and when ''coasting downhill ''. Any help will be welcomed. W124, 4 cyl, petrol injection .
