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Multiple, Intermittent Electronic Issues

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Old Dec 12, 2024 | 08:42 PM
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weyres
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2016 E550
Multiple, Intermittent Electronic Issues
Hi MBWorld,
Hoping someone can help with this…my 2016 E550 has had the following issues recently:

1. Active Lane Keeping Assist Inoperative & Active Blind Spot Assist Inoperative (always together)
2. Radio will turn on but no sound or won’t turn on at all with car
3. Active Headlamps Inoperative

In the case of #1 & #3 above, both alerts go off when I turn the car off then back on. If I turn the radio off and back on it works normally.

Any idea what the problem might be?

Thanks
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Old Dec 12, 2024 | 09:59 PM
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19 GLA45, 86 560SL, former: 14 E550 4Matic, 09 E350 4Matic, 83 240D manual, 78 450SLC, 81 500SLC
Since you have a 2016 E550, I assume you are in Canada?

Since you are in Canada, I will assume it's cold AF lately?

Any correlation there?
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Old Dec 12, 2024 | 10:51 PM
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W212 MY'14 M276-3.5NA @75kMi
easy way out
Originally Posted by weyres
Hi MBWorld,
Hoping someone can help with this…my 2016 E550 has had the following issues recently:

1. Active Lane Keeping Assist Inoperative & Active Blind Spot Assist Inoperative (always together)
2. Radio will turn on but no sound or won’t turn on at all with car
3. Active Headlamps Inoperative

In the case of #1 & #3 above, both alerts go off when I turn the car off then back on. If I turn the radio off and back on it works normally.

Any idea what the problem might be?

Thanks
This is textbook... low voltage result.

The fastest way out of this predicament is by using a modern automated battery charger.

What's causing this happen is either:
old battery
drained while parked
drained by driving
or all together combined

FYI: Driving with "Headlights ON" forces a perfect 14.4V charge voltage.

Consider scanning your chassis to get a complete fault report.
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Old Dec 13, 2024 | 10:13 AM
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2016 E550
Thanks ChuangTzu for your response. I don't think the temp is an issue as it's kept in the garage and the issues have been occurring since the summer.

Originally Posted by ChuangTzu
Since you have a 2016 E550, I assume you are in Canada?

Since you are in Canada, I will assume it's cold AF lately?

Any correlation there?
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Old Dec 13, 2024 | 10:14 AM
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2016 E550
Great point CaliBenzDriver, the battery is going to be replaced this weekend as my mechanic said it was showing low voltage. I'll send a follow-up after...Thanks
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Old Dec 19, 2024 | 11:04 PM
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2016 E550
New battery seems to have fixed everything, thanks very much MBWorld
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Old Dec 20, 2024 | 02:05 AM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by weyres
New battery seems to have fixed everything, thanks very much MBWorld
How many month is your battery prorated warranty ?
It's good to keep in mind: for frequent battery replacement use the warranty for free discount.
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Old Dec 20, 2024 | 06:31 PM
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Energizer battery bought @ Costco so 4 years I think…
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Old Dec 20, 2024 | 08:08 PM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by weyres
Energizer battery bought @ Costco so 4 years I think…
4Yr old means not much prorated warranty value left if any.

My original battery lasted past 120Month so these AGM don't die at 5Yr mark like old liquid acid type.
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