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1990 Mercedes-Benz 300 Diesel - Page 9 Questions & Answers
I have a 1991 300E Benz, automatic tranny. when
When it is cold in the morning, the cold start valve will be opened to give extra fuel to help the start. If it is not opened then it would take longer to start. The cold start gets the feedback from a thermal sensor at the top engine block. Check out this sensor. When it is bad it would tell ECM that engine is warm so the cold start valve is not open. The sensor is cheaper than the cold start valve.
The idle spec is 750RPM but I think it is high and wasting fuel. Mine is 600 RPM and its idle is smooth so I wouldn't worry about it is low, as long as it is not hesitating.
I NEED A FUSE BOX DIAGRAM FOR A 1986 MERCEDES 300SDL
The fuses are identified on a card attached to the inside of the fuse panel cover. A spring clamp holds the cover in place. The fuses are available wherever German Auto Parts are available. Volkswagen - after market fuses seem the most plentiful. They are color coded .. replace same for same. For example on a 84 300SD fuse 18 controls the Power Windows LF & RR & is a 16 AMP. Fuse 5 is a 25 AMP for the seats. A fuse burns out because their is a problem .. for example .. a slight rear end crash could short at tail light socket & crush the bulb .. Fuse 1 an 8 AMP fuse would blow .. this would also cause you to lose your taillights . warning system & Instrument illumination , as they all share the same circuit. a blown fuse .. melts.
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