COMAND not turn on - Mercedes-Benz Forum

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post #1 of 5 (permalink) Old 04-04-2008, 07:43 AM Thread Starter
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Post COMAND not turn on

I am looking for help on my E350 COMAND. It will not turn on anymore. If I keep pressing the power on/off. It will show the Mercedes-Benz logo and slowly disappear right away. There are no light any where on the COMAND buttons. I think it fuse is blow out. I try to look for the fuse on the driver side door, fuse box in trunk, and under the hood, but could not find the blow fuse.

It happen when my cigarette lighter fuse was blow out. I was be able to locate the blow fuse under the hood, but don't know where to find the fuse for the COMAND. Please advise and thanks in advance...
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post #2 of 5 (permalink) Old 04-04-2008, 07:07 PM
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I am no expert, but if your COMAND at least comes on for a moment, I don't think it could be a blown fuse. It is more probable that if you have a blown fuse the screen would not light up at all. I have had trouble with mine too, in fact, it acted up today and I scheduled a service appointment for next week. Are you not still under the factory warranty?

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post #3 of 5 (permalink) Old 04-05-2008, 07:38 AM
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your comand needs a software update. i perform multiple software updates on vehicles several times a week for this problem.
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post #4 of 5 (permalink) Old 04-05-2008, 07:42 AM
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Is the update something the owner can do? Or does it have to be taken to the dealer?

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post #5 of 5 (permalink) Old 04-05-2008, 10:50 AM
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The dealer or someone with a computer to program our modules has to do it. But its also possible you have a problem somewhere else with the fiberoptic network. If any component on the fiber optic network fails it will take the whole system down. I have seen some wierd things cause these problems i.e children putting quarters in the cd changer
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