Hello ! An acquaintance has a MAN TGS 440 Ps, one year old and is traveling in distribution traffic with fuel oil. A few weeks ago the on-board computer reported a generator failure. It was then checked at MAN and changed. However, a short time later the same game… always sporadic error messages with voltage drop etc Yesterday the TGS did not make it to the workshop, since the voltage fell on the way under 20 V, so was alternator number 4 !!!!!! built. MAN suspects a bad series alternators…I suspect that the truck is the problem…well a bad contact that destroys the controller ??? Who would have experienced an idea or maybe similar? Greetings Jang