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#1
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How many O2 sensor(s) are on the 1993 400SEL (W140)?
How many O2 sensor are on the 1993 400SEL (W140)? Is it a DIY job??? If so, does anyone have detailed instructions? Pictures would be helpful. My direct email address is: wkr21@hotmail.com THANKS-A-MILLION!!!
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#2
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ONE (1) sensor & yes an easy DIYer.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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I always wonder why almost all modern V8/V6 engines start to use 2 upstream O2 sensors, 1 per cylinder bank, plus at least 1 downstream O2 sensor, that's more than MB M119's single O2 sensor.
My 11 year old 400E just passed emission test last week, the maximum pollution I got for idle and 40kmph was HC of 40 ppm and CO of 0.03%, does anybody know what numbers one normally gets from new V8 MBs?
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99 BMW 540i 6-speed 110K Km 03 SAAB 9-5 wagon 80K Km 92 400E (Sold) 245K km Still missing the days with the Benz, it kept me busy. |
#4
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Thanks M.B.DOC!!! Do you have detailed instructions??? Are there any special tools required??? Typically, how long should it take? Do you have any illustrations, pictures or links???
Thanking you in advance. BigBody400SEL |
#5
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Quote:
The downstream O2's monitor catalyst efficiency, all for the sake of cleaner exhaust. |
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