Mercedes C Class Trouble Code Reader is for real-time automotive diagnosis based on OBD2 protocols. Simply plugging it into your vehicle's OBD2 16 pin diagnostic socket, you may read trouble codes related to the Engine and Transmission systems, identify the code by consulting the manual and clear the errors. Features Read & Erase Diagnostic Trouble Codes from Engine and Automatic Transmission systems Turn off CHECK ENGINE light Displays over 700 possible error codes Built-in OBD2 16 pin Extension Cable & User Manual with Code Descriptions Small & portable, easy to use No PC or additional parts required to operate No battery needed, Power is directly supplied by the diagnostic socket Compatible models Works with Mercedes Benz C32 ~ C55 ~ C180 ~ C200 ~ C230 ~ C240 ~ C320 ~ CLK55 ~ CLK200 ~ CLK240 ~ CLK320 ~ CLK500 ~ CL55 ~ CL65 ~ CL500 ~ CL600 This scanner does not work on CAN BUS vehicles. If you are not sure whether it works on your Merceces or not, please send ebay message or email to us. 1.PayPal only(accept credit card to pay by credit card via paypal). 2.usually items will be shipped the same day as payment received. 3.Express Mail shipping or standard air mail shipping, please allow about 5-25 days for shipping time. 4.We do offer combined shipping.                                                      Refunds: The full purchase price less the Shipping & Handling will be refunded upon return of the item. if shipping was free, The refund will be the full purchase price less the shipping cost. the item must be returned undamaged in the original packaging.            Faulty items: If your item arrives faulty, we will exchange it for a replacement. if you prefer a refund. the full purchase price less the Shipping & Handling will be refunded upon its return. if shipping was free, the refund will be the full purchase price less the shipping cost.           We make every attempt to answer your technical questions. we provide full documentation & troubleshooting for most of our items. we also can refer you to a seller who will sell the same or similar products with tech support .