CGDI MB FBS3 BGA KeylessGo Key One-key Start 315Mhz, 433Mhz,Compatible with multi Benz key programmers, VVDI MB, CGDI MB, AVDI etc.Frequency is able to be exchanged.CGDI MB FBS3 BGA KeylessGo Key One-key Start 315Mhz, 433MhzTested and working on: Benz 2008.12 up W164, W164 W166 W216 W221 W251 Models W221-S series W216-S series W164-ML series W251-R series W166-ML series W164-GL series 207 C Series 204 C Series 212 E series Can be reused. Compatible with multi Benz key programmers, VVDI MB, CGDI MB, AVDI etc Check MB Key Shell . BGA KeylessGo key has three separate buttons.  CGDI MB read key version 78 or 76  How to Unlock/Reset CG KeylessGo Key? 1). Manual Reseta. First press the Trunk buttonb. Then press the LOCK button until the key indicator keeps turning onc. Wait for 1 second, Press the UNLOCK button until the key indicator flashes twice.d. Key has been erased successfully2). Reset via CGDI MBInsert BGA keylessgo key into CGDI. Read key status, key has been usedPress ResetKey has been erased/unlocked.