The diagnostic communication of the pre-'07 Sprinters is based on K-lines with 4 different diagnostic protocols. Those being: KWP2000N, KWP2000PE, KW FB(Franz Becker) (KW refering to "keyword")These first 3 from Germany and the fourth is MB ISO(kind of 9141-2). The '07 and newer models feature CAN based diagnostics. Doktor A