with this dongle it is possible to increase the charging power from 3.7 kW to 7.4 kW Suitable for the following vehicles A-Class 177 Series B-Class 247 Series CLA-Class 118 Series E-Class 213 Series E-Class Cabrio/Coupé Series 238 GLA H247 247 Series GLB X247 247 Series GLC X253 253 Series GLC C253 253 Series GLE V167 167 Series GLE C167 167 Series GLS X167 167 Series Activation and deactivation via your vehicle's diagnostic interface Simply connect the adapter to the interface Vehicle OBD - Done! Scope of delivery: 1x coding dongle Note: A 2 or 3 phase charger is required to provide the 7.4 kW power