Check the listing for details. OBD1 Diagnostic code reader for Mercedes cars with the 8 or 16 Port. Condition: New. Listed at 34.99 USD. OBD1 Diagnostic code reader for Mercedes cars with the 8 or 16 port. W124 W126 W140, R129 The unit will work for all Mercedes vehicles 1988-1995 with the 8 or 16 diagnostic port which you can find in the engine bay or the fuse box. You will be able to pull and reset your trouble codes. Features:High quality test leads - Black, Yellow and RedSolid construction not home madeBright LEDUser friendly directions Your package will include:OBD1 Code Reader for 8 or 16 port socketStorage bagStep-by-step instructions with pictures and diagramsComprehensive master code file for 1988-1995 vehicles Everything you need will be provided on how to read the fault codes and how to clear the fault codes including a Master PDF file that will assist you in identifying the trouble codes and check engine lights.