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Old 12-19-2003, 11:10 PM
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zorin zorin is offline
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Join Date: Feb 2003
Location: Ottawa, Canada
Posts: 126
The Fuel Injection Diagnostic port on my 300E is like a plug. You measure the signal at the end of plug 3 and different duty cycles (or voltage) would indicate a different problem or too lean/rich mixture. I am not sure if 190E has a similiar place.

'88 Benz 420 SEL
'79 Porsche 911SC ('87 Carrera Engine)
'00 BMW 540 Sports Package
'99 Land Rover Discovery

86 300E - Manual (sold)
88 260E (sold)
84 944 (sold)
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