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Engine operates normally. This just happened out of sudden while driving. Car wasn't flooded or anything either. Why would this happen?
Link of a video showing the problem is below. Unfortunately won't let me send actual videos.
posting shortcuts to web links is a bit dodgy - for all we know that’s some israeli spyware designed to turn our PCs in to pumpkins
221s love to share scary messages on the cluster - if you confuse it well enough they will cycle every message its got... often when the GCW is bombarded with comms from multiple CAN networks it will reach the cluster and display a temper tantrum - often battery off for 20 mins will bring some sanity back - but you need to know what caused it
usually Rear SAM or the roof module (OCP) will get you there when programming or such - shouldn't happen on a drive.
posting shortcuts to web links is a bit dodgy - for all we know that’s some israeli spyware designed to turn our PCs in to pumpkins
221s love to share scary messages on the cluster - if you confuse it well enough they will cycle every message its got... often when the GCW is bombarded with comms from multiple CAN networks it will reach the cluster and display a temper tantrum - often battery off for 20 mins will bring some sanity back - but you need to know what caused it
usually Rear SAM or the roof module (OCP) will get you there when programming or such - shouldn't happen on a drive.
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Basically. The whole dashboard. It's like when I constantly turn my car keys. All lights flash, the speedometer goes to 0 then back to my speed, rpm drops to 0 then goes back, and does that constantly throughout the whole ride. Every single warning light turns on basically. The photos below show what it does. I'm driving 60km/h whole time. And all warning lights turn on constantly as the speedometer, rpm gauge drop and goes back constantly. I hope this is better.
Basically. The whole dashboard. It's like when I constantly turn my car keys. All lights flash, the speedometer goes to 0 then back to my speed, rpm drops to 0 then goes back, and does that constantly throughout the whole ride. Every single warning light turns on basically. The photos below show what it does. I'm driving 60km/h whole time. And all warning lights turn on constantly as the speedometer, rpm gauge drop and goes back constantly. I hope this is better.
How old is your Auxiliary Battery? I would start with that.
2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
This sure looks like a low voltage issue to me. What year W221? 2007 has a big consumer battery in the trunk and a starter battery under the hood. When the battery in the trunk gets old and suffers lower voltage, if the alternator cannot charge it enough to see 12+ volts; the car starts to shut down consumable items like your heater, your radio, your instruments, etc. Doesn't usually affect the ability to start the car because of that separate battery up front. Later models don't have the trunk battery. Just a bigger battery up front.
If you have a trunk battery, I would bet you a donut it is +7 years old and needs replacement. If the battery is new-ish, check your alternator for any belt slippage and output. You should see 14.0 volts or more when the engine is running. Could be a bad alternator or a flat battery; or both.
This sure looks like a low voltage issue to me. What year W221? 2007 has a big consumer battery in the trunk and a starter battery under the hood. When the battery in the trunk gets old and suffers lower voltage, if the alternator cannot charge it enough to see 12+ volts; the car starts to shut down consumable items like your heater, your radio, your instruments, etc. Doesn't usually affect the ability to start the car because of that separate battery up front. Later models don't have the trunk battery. Just a bigger battery up front.
If you have a trunk battery, I would bet you a donut it is +7 years old and needs replacement. If the battery is new-ish, check your alternator for any belt slippage and output. You should see 14.0 volts or more when the engine is running. Could be a bad alternator or a flat battery; or both.
Keep us posted.
I do have a spare battery laying around that's basically brand new for situations like this. The car is 2008 model year. I will give it a try tomorrow and I'll update you all. I'm not sure about the auxiliary battery. I'm a pretty new owner of this car so I'm learning everything slowly! Where is it located and what does it do? Thanks.
2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
So the 2008 W221 has a trunk battery in the trunk and a starter battery under the hood. Your trunk battery is the one causing your voltage hassles. You can access it by pulling down the panel behind the rear seats from inside the trunk. Here is a youtube
The trunk battery is an H8. If your spare battery is of similar size and CCA and is known good, definitely swap it.
I may be wrong, but there is no aux battery in your instrument panel for the ISM transmission shifter. That started in 2010 along with the single battery upfront.
Don't forget to check the output of your alternator. If your alternator is faulty, replacing the battery will only lead to another dead battery. If the new battery solves it and your alternator output is good but the battery still dies overnight, then you have a parasitic draw and you will need to do further analysis and investigation.
I changed the battery with a similar one. I noticed the battery that was inside already was from march 2023, which didn't make me have high hopes it'll work, but after I changed it the car fired up normally but without any warnings.. but it's like that for now. We will see if it stays like that for few days
2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, 2017 Mustang GT, 2023 300C, and a 2019 Lincoln
The W221 is very sensitive to voltage changes. It wants a constant clean 12 volts. If much under 12 volts, the car does very strange things trying to preserve its power. If the recently changed battery dies in a few days or a week, then you have another issue probably parasitic drain or poor alternator output. Cold weather increases the problems.
The W221 is very sensitive to voltage changes. It wants a constant clean 12 volts. If much under 12 volts, the car does very strange things trying to preserve its power. If the recently changed battery dies in a few days or a week, then you have another issue probably parasitic drain or poor alternator output. Cold weather increases the problems.
Please keep us posted in a few days.
Car works flawlessly for now. So I won't touch or change anything until if shows signs of dying again.
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