Features: 1.Perfect Fitment: Immobiliser system diagnostic tester tool is replacement for Meredes?Benz 1998?2010, perfect matching your car. 2.High Quality Material: Easy checker is made of high quality ABS material, wear resistant, anti aging, lightweight, high strength and durable. 3.Application: Auto lock inspection loop tool is indispensable for locksmith or key programmer, more convenient and practical. 4.Function: If light on means the lock no problem; if no light on means the lock loop have problem, easy to use. 5.Professional Design: Professional manufacturing, exquisite workmanship, stable performance and high reliability, have a long service time. Specification: Item Type: Coil Checker_x000D_ Material: ABS_x000D_ Fitment: Replacement for Meredes?Benz 1998?2010_x000D_ Usage: _x000D_ Replacement for Benz car model:_x000D_ Put Easy-Checker on the EIS, put your IR key into EIS._x000D_ Light on and not off, then EIS and key all ok_x000D_ Light on then off, then EIS ok,key not ok_x000D_ Light on and not off but car still can not start, please check ESL Steering wheel lock and Key whether ok._x000D_ Light not on,then EIS not ok._x000D_ EWS system:_x000D_ Put Easy-Checker on EWS(no need insert key)_x000D_ Light on means EWS ok(can used on:E46/E39/E53)_x000D_ Insert Easy-Checker into EWS(insert key in)_x000D_ Light on not off,then Key and EWS all ok_x000D_ Light on then off, then EWS ok, key not ok_x000D_ Light on and not off,but car still not start, please check whether key is ok_x000D_ CAS System( for 1 series/3 series/ 5 series/7 series)_x000D_ Put Easy-Checker directly on CAS and insert key in_x000D_ Light on and not off, then CAS and key all ok_x000D_ Liht on then off, then CAS OK but key not ok_x000D_ Smart Key slot-key_x000D_ Put Easy-Checker directly on the EZS and insert key in_x000D_ Light on and not off, then EZS and key ok_x000D_ Light on then off, then EZS ok,key not ok