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Discussion Starter #1
i've noticed some socket inside car under the wheel, this socket has a cap
what is it for? who knows?

thanks
 

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Discussion Starter #3
but diagnostic connector is under the hood on the left side...

wonder what is this socket for then... :?:
 

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The one under the hood is the MB specific diagnostic connector. Vehicles produced for model year 1996 and newer all are required to have a universal OBD II connector under driver's side dash. Many MB's had both for a little while (202's, 208's, 210's, later 129's, later 140's, early 170's), until they eventually did away with the 36 pin connector under the hood.

Anyway, the one under the hood is used for MB specific scan tools while the one under the dash are used for universal scan tools.
 
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