The new Mercedes device working with smart key (old and new) using in car since 1997 up to 2005 - without keyless go system. You can program new key (or used) in car and program old key if it do not work more. You read and program eeprom of CPU from Steering blocking module via diagnostic connector (38 pins). Desolder and read via programmer two CPU from Electronic Ignition Control Module. Load these eeproms to program. Desolder NEC CPU from the key. Soldering it on the device, select the No of key and program it. Solder all CPU on their places and start the car.