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Throttle Body Tech Needed
I need a tech with some experience with the Euro models. I have a 117.962 engine and pulled the throttle housing to make sure that no vacuum leaks where present.
I was surprised to find the bottom port on the throttle housing open. It is missing the extension tube and the port does not pass into the throttle body. It has a plug type device that diverts it back to open air. Manual shows the top port for EGR and bottom for Vacuum switch, which I don’t have. SO do I need this bottom port? On the other side of the throttle housing the 3/2-way switch is missing. In my manual (US) it shows a mechanical/pneumatic switch over valve that connects to the warm-up compensator – lower chamber. The valve is responsible for full load enrichment via the warm-up compensator. Prior to 1981 the lower chamber was open to atmosphere. 1983 500SL 117.962 engine, 107.046 chassis, emissions CAT only. Warm-up Compensator is Bosch 436 140 101. Manual 7.3-120 checking fuel pressure does not list my compensator. Thank for help, advice, or assurance.
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1983 500SL Euro |
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Second photo
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1983 500SL Euro |
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Last Try Photo
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1983 500SL Euro |
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You may want to call Bosch directly and ask to speak to a tech rep. They are usually very helpful.
Bosch Customer Service: 888-715-3616 (Monday thru Friday 8:00 am to 5:00 pm CST; for U.S.)
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Rick '85 380 SL (sold) '85 Carrera Flatnose '71 280 SL Signal Red/Cognac |
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Quote:
They did clear up questions.
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1983 500SL Euro |
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Euro 126 throttle body
Yours is exactly correct as is. It does not have that vacuum switch referred to in the U.S. verion manual. You also do not have EGR.
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