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      09-14-2019, 12:30 AM   #1
HansLankari
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Problem, electrics stalling

2013 F10 M5 and driven 45 000 km
I have had this car now for 6 month, 10 000 km, and no worries until now, just smiling and cruising.

For the last 2 weeks it has been doing a very worrying electric problem.
In the middle of driving, it stalls all electricity for a fraction of a second, and zeroes every thing, from the clock until all. When it does it, it also gives all kind of error codes; ABS, lack of brakes, tyre pressure, rear axle, etc. Obviously just goes nuts because this sudden lack of power is in the middle of vehicle moving.
2 times it has now done that when I stop, and push the start button for the first time to shut down the engine, it shuts down all. And there is no electrics anymore. Nothing. Completely dead. Doors not working, steering wheels stays low, and start button not responding. Neither no life from remote.
If I wait some 10 minutes, it then switches the electrics on again.
Today, it did this in the parking lot, and just stopped the engine while still moving. I rolled to the parking place and it was dead.
Waited, and it did not wake up.
I tried to move a bit the red main cable under the hood, and also where ever in the cable joints I can reach. Nothing.
The battery I change some 3 month ago. Varta, a good one.
Now the next step is to see if those connection are fine. And maybe try and buy a new battery, if this one is a "Monday model".
Right after I can open the booth...

Will keep you updated.
(I just LOVE electricity problems...) 😐
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      09-16-2019, 12:38 PM   #2
technician117
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Sounds like a battery connection is loose. If you replaced 3 months ago, it may have taken that long to vibrate loose.
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      09-25-2019, 11:16 AM   #3
HansLankari
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I guess resolved:
Bought a new battery, and the problem disappeared. The battery connections were well tight, and it did not help to retight them.
N9w I have had new battery for 5 days, and no problems.
So the old battery was short cutting.
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