The ISM control units can be renewed inside the car using internal CAN connection or Outside connected to on a bench. The procedure is the same as described above, except for the following:

1. When the renew procedure is complete, the MB Diagnostics will ask you to unplug the AVDI cable from the OBD diagnostic port of the car and to lock the car for 2 minutes.

Please, follow the instructions carefully. The car should go to sleep – do not touch anything after you lock the car.

2. After the 2 minutes have passed you can unlock the car and then you can adapt the ISM unit.