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  #1  
Old 09-26-2008, 07:21 PM
84 500SL Euro
 
Join Date: Sep 2008
Posts: 27
info re:Diagnostic Plug in early 80's 107 models

I have an '84 500SL Euro, see signature, that has a diagnostic plug on the middle of the L fender well but have no information on it's 9 contacts as I've been unable to locate a shop manual for this car.

What does the plug test, what devices can access it's information, where can such devices be gotten, and what readings are correct ?

I'm hopeful that some ABS info may be obtained this way as my dash light stays on after it's initial test, but is initially off at startup.

Thank you,
Courtney

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'84 500SL Euro
WDB 107 046 ~
117 962 ~

'82 380SL US
WDB 107 045 ~
116 961 ~

'83 240D
'90 Audi Turbo 200
'91 Jetta GL Ecodiesel
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  #2  
Old 09-26-2008, 08:23 PM
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Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Originally those connectors were designed for a engine tester that was never used by MBNA. The US cars eventually had lambda control monitored there and there was a small box made by Bosch that could be used to monitor Lambda. A euro car of that age wouldn't have lambda though.

The original tester could have looked at engine speed and timing and battery voltage.

Not only is there no ABS data there, but there is no self diagnostics on the early ABS systems anywhere. Testing was done with the Bosch LED tester or by individual circuit testing.
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Continental Imports
Gainesville FL
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33 years MB technician
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  #3  
Old 09-26-2008, 08:37 PM
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804



..first check under those conditions would be the sensors for open/short.
Ohm meter??

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