Auto-Scanner for Benz S&E-Class is newly developed and specially designed for car owners or DIYs. With a Auto Scanner, you may quickly find out trouble causes of electronically controlled systems on your car by reading the trouble code (DTC) shown on Auto-Scanner and checking out trouble causes with attached MANUAL. Though so small, it is of the same function as special tool of its kind and applicable to 16 pin socket Mecedes Benz S&E-Class. Compatible with: Compatible with: E200 ~ E280~ E350~ E500 ~ S280 ~ S350 ~ S500 ~ S600 ~ SLK200 ~ SLK280 ~ SLK350 2. FUNCTIONS Reading trouble codes: when press the "read" button, the Auto Scanner will Read DTCs of powertrain system one by one. Clearing trouble codes: when press the "clear" button, the Auto Scanner will clear DTCs of powertrain system. 3. OPERATION When the"CHECK ENGINE" light is on, stop the car and apply the parking brake, start the engine then plug the Auto Scanner to the 16-pin socket usually located under the instrument panel in the car. It will display the brand name "UIF"twice . then press the "READ" button, it will read the trouble code reader trouble code and display 3 times. If there is no trouble codes, it will display [-- -- -- --]. When press the "ERASE" button, it will clear the trouble codes. In case that Auto Scanner can not be plugged in directly or codes can not be seen due to socket facing downward, use the extension cable with the female plug to connect with Auto Scanner and 16pin plug with socket. 4.Specifications Dimensions: 32 inches in length. Head unit: 2 1/8 inch x 3 1/8 inch x 3/4 inch Port: 16-pin OBDII Standard Socket LED Display No batteries needed. Power is directly supplied by the diagnostic socket.