The C503 is a multi-function diagnostic instrument designed for Vw models that will enable you to read and clear all of Classes' diagnostic faults in the Vw.Such as 01-Engine control module 1,02-Transmission control module, 15-Airbag,17-Dash board,08-Air conditioning.We also have OBDII features that allow you to scan all engine readings and associated fault codes on any later vehicle manufacturer / model.Speicaially for DIY users and the servicemen of small servive factorued.This product supplies color LCD display and presonalized funtion menu.