Battery rapid voltage drop while driving?! How?
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MBWorld Fanatic!
Joined: Aug 2015
Posts: 1,059
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From: DC Metro Area
2007 Mercedes E550
Battery rapid voltage drop while driving?! How?
Hope you guys can help me out with this one. Started my car today and battery was full voltage. Drove about 5 minutes and suddenly radio turns off, as well as AC, and I got the "convenience features temporarily unavailable" indicatung low battery.
How could my battery drop like that? Is that necessarily a bad alternator? My plan is to monitor voltage on the dash next time I drive; I had to park my mercedes and take the civic on my road trip. And of course my I heard about it the whole trip from my wife...
Aside from alternator, could it be something else. Note I believe I have had a parasitic battery issue lately, and my battery voltage has been going up to 14.2v while driving??
How could my battery drop like that? Is that necessarily a bad alternator? My plan is to monitor voltage on the dash next time I drive; I had to park my mercedes and take the civic on my road trip. And of course my I heard about it the whole trip from my wife...
Aside from alternator, could it be something else. Note I believe I have had a parasitic battery issue lately, and my battery voltage has been going up to 14.2v while driving??
Thread Starter
MBWorld Fanatic!
Joined: Aug 2015
Posts: 1,059
Likes: 73
From: DC Metro Area
2007 Mercedes E550
Hey Buddy, I do not think I am getting overcharging since my car is getting to the normal 14.2v while driving. But the voltage randomly drops to about 12v and then returns to 14.2v. Is this what happened to you as well??
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Joined: Apr 2007
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2006 E320 CDI
