We have been having a recurring, intermittent electrical problem with 836. The mechanics have recently inspected and replaced the starter, alternator and batteries. In order to prevent the recurrence of problems, please make sure the following steps are taken:
When starting the vehicle
When starting any diesel vehicle, it is important to wait for the glow plug lights on the dashboard to go off. Put the key in the ignition, turn to the on position, but wait for the spring light (the second from the top in the picture) to go off before turning the key to the start position.
When turning off the vehicle
Make sure that when you remove the key from the ignition, that there is nothing beeping. This will confirm that the battery power is off and will avoid draining the battery needlessly.