Weird Electrical Problem, Or Just Low Bstteryt.
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 57
Likes: 7
From: Eagle River, Alaska
2018 Mercedes-Benz E400 4MATIC Wagon
Weird Electrical Problem, Or Just Low Bstteryt.
After a month or so of problem-free ownership of our 2015 GL 450 with 27K miles, I'm having what seems to be a dead battery but may be strange electrical symptoms with a different cause.
We bought and had programmed a third transponder key last week. I don't think the problem is related to that, but who knows?
A few hours after parking in the garage, my wife happened to go out there and noticed "something weird going on with the lights." I went to the garage and found the star on the grill lit, as well as tail lights.
Getting into the car, I noticed the climate controls were lit, as well as the "on" button of the audio system.
Pressing the lock or unlock button on the key fob did nothing. Pressing keyless go also did nothing. Same for removing the keyless go button and inserting a key. Nothing. I noticed the chassis raise button and the button next to it were on, but after a few minutes they started blinking and then finally went out.
Apparently the battery is completely dead, but I have no idea why. I don't think I shut it down improperly or left anything turned on when I parked. I don't remember any lights being left on when I exited the car.
Naturally, we discovered this at almost midnight on a Friday night.
Other than calling the dealership or AAA in the morning, does anyone have any suggestions, or ideas how this might have occurred?
We bought and had programmed a third transponder key last week. I don't think the problem is related to that, but who knows?
A few hours after parking in the garage, my wife happened to go out there and noticed "something weird going on with the lights." I went to the garage and found the star on the grill lit, as well as tail lights.
Getting into the car, I noticed the climate controls were lit, as well as the "on" button of the audio system.
Pressing the lock or unlock button on the key fob did nothing. Pressing keyless go also did nothing. Same for removing the keyless go button and inserting a key. Nothing. I noticed the chassis raise button and the button next to it were on, but after a few minutes they started blinking and then finally went out.
Apparently the battery is completely dead, but I have no idea why. I don't think I shut it down improperly or left anything turned on when I parked. I don't remember any lights being left on when I exited the car.
Naturally, we discovered this at almost midnight on a Friday night.
Other than calling the dealership or AAA in the morning, does anyone have any suggestions, or ideas how this might have occurred?
Last edited by Kevin T; Sep 9, 2017 at 04:53 AM. Reason: Add info
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 57
Likes: 7
From: Eagle River, Alaska
2018 Mercedes-Benz E400 4MATIC Wagon
What do you mean by "correctly and quickly?"
The car is under warranty, but I'm not sure about emergency assistance.
As for my multimeter, it's in a garage cabinet directly in front of the dead car. I could possibly get to it by climbing up on the car but I don't want to do that.
Last edited by Kevin T; Sep 9, 2017 at 01:02 PM.
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 57
Likes: 7
From: Eagle River, Alaska
2018 Mercedes-Benz E400 4MATIC Wagon
Yes, it's still under factory warranty.
Roadside assistance is coming to transport the car to the dealership for diagnosis as to why the battery is dead. I'm curious to learn what caused a drain after I parked. As far as I know, all doors were closed and nothing was left on.
Roadside assistance is coming to transport the car to the dealership for diagnosis as to why the battery is dead. I'm curious to learn what caused a drain after I parked. As far as I know, all doors were closed and nothing was left on.
