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1990 Mercedes-Benz S-Class - Page 5 Questions & Answers
1990 mercedes benz 500 SL
it could very well be just the seat belt latch but you really need to see what codes are being set because there could be other issues as well. You need to get the SRS system scanned. I do not know if the seat will need to be removed. If the latch is attached to the seat itself and it most likely is I'd say yes the seat will have to come out. Very easy to do. Move seat in full back position to get front bolts out and full forward position to get rear bolts out and then carefully disconnect all electrical connectors going to the seat.
2000 s430 wont shift out of 1st gear
If its an auto box check oil lvl or do a transmition oil and filter change most mercs are bullet proof and its normally daft things that make them go wrong
I have a mercedes benz W116 280 SE USA version
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.
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