The W123 chassis covers 240D's, 300D's, 300TD's, 280E's, and several other models of Mercedes coupes, sedans and wagons from model years 1977 to 1985.

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How do I replace the engine shut off switch?

i have been looking all over the internet and can't find any videos or even an explanation on how to replace the engine shut off valve. i have a 1984 Mercedes 300D turbo diesel. i see where the valve is however there is only about 2 inches between the injection pump and the oil filter housing and the valve is right in between. - do i need to remove either to get the valve out? - do i need to drain the oil to change the valve? - is there a specific way the valve is set into the injection pump?

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@savageray ,renalesraymond, Read through the links below, 1st link is the procedure to change SOV . 2nd and 3rd link is good info. Good luck.

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wow thank you so much L Pfaff. you are amazing. for the past month i have been searching all over for an explanation on how to replace it. i know the part is bad due to the oil being sucked into the vacuum line. i ordered the right part about 2 weeks ago, but thought it was something else causing the oil to get into the vacuum line. well now i know better. man thees cars are hard to get info on some times. most of the repairs i have done so far are not in the repair manual. but thank you. now i have to wait for the part to come in.


@savageray , Raymond, have to agree with you, info is hard to come by a lot of the time. Thank you for posting back, have a good day.


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renalesraymond will be eternally grateful.
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