Mercedes cars with the 8 or 16 socket connection. Please verify what your has before purchase. Also look at the code file and see if the systems you need to diagnose are listed.
1988 - 1995
$36.00
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Read and Reset fault codes on 1988-1995 Mercedes cars that have the 8 or 16 socket diagnostic port near the battery. 
16 Socket located near battery
8 Socket located near firewall
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Mercedes cars with the round 38 socket connection. Please verify what your has before purchase. Also look at the code file and see if the systems you need to diagnose are listed.
1988 - 1995
$36.00
Free Shipping Includes
Read and Reset diagnostic fault codes on 1988-1995 Mercedes cars that have the round connection with 38 small holes.
Kent at Mercedes Source is super sharp on Mercedes vehicles. Check out his website https://mercedessource.com/
If your car has a button and LED test port you can read and clear your codes without an external code reader. If not, you need to buy my code reader which does the exact same thing as the little button does. Except my code reader plugs into each individual socket and gives you flash codes for all your systems.
All OBD1 code readers are wired and function the same. Only difference is the ends. Its either banana plug for the 8 and 16 socket and 1mm ends for the 38 socket.
Peter Davidson - Brandon, Florida made a fantastic video on code reading. It's the same procedure for all OBD1 cars with 8,16 or 38 socket cars. Please subscribe to his Youtube channel.
Round socket with 9 holes?
Those cars are NOT OBD1. No codes are stored and my code readers won't work. The 9 pin is read with an ohm meter to determine on/off values. I don't have any experience or details on the 9 pin. Youtube has a video that may help. https://www.youtube.com/watch?v=5syKYwfEyCo&list=PLg-Bx-y-F2JDJa7AaQWXykPryK8C5yuJS 
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