Question about Mercedes-Benz S-Class
It has been a long time but I seem to remember the K Jetronic is adjustable but the adjustments are normally sealed from view. I don't have the information to hand.
I also seem to remember the system used a separate enrichment device for cold starting and warm up which could perhaps cause idle problems if it isn't working correctly.
Considering the age of the car it would be wise to employ best practice and examine the basics first. Clearly considerable maintenance has already been carried out but you didn't mention a general tune-up where the ignition timing and valve clearances are checked, the engine breather, throttle body and fuel distribution metering unit is cleaned.
It would be well worth checking for intake air leaks especially through the brake booster. If the intake valve seats aren't in virtually perfect condition each combustion can leak into the intake manifold and cause the next incoming charge ineffectual. Only a cylinder leakage test can diagnose this.
If no other fault is found the quality of the injector spray pattern must be tested. If an injector isn't spraying correctly and the engine is running too slowly for the incoming air to break up large fuel droplets the burn will be impaired and although it will behave as a weak or lean mixture, much still burning fuel will be expelled through the exhaust valve.
Posted on Sep 02, 2017
hello, 560 sel,,,model 126.039 engine with v-8,engine number 117.968 ke is is fuel injection system.ref. book;technical data mb,ty
Posted on Apr 29, 2009
Have a dealer or garage check your Oxygen (O2) sensor. As a quick fix, try disconnecting and reconnecting your car battery. Sometimes this will reset the check engine light.Good Luck!
Posted on Aug 01, 2009
it starts from cold because the auto choke is on ,allowing a richer mixture ,try removing the sender unit in the tank and seeing if the connection from the pump to the outlet connection is ok or leaking causing a loss of fuel pressure
Posted on Aug 02, 2009
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