So I've been having an issue that seems a bit persistent. Whenever I shutdown my G80, it seems to loose all power i.e. the music, the image of the car in the gate cluster will stop, and the seat will cease to retreat. If you try to start the vehicle it will not start. Should you open the door, then it's fine. This has been going on intermittently for well over a year. FWD to this past December and the vehicle went a step further, my wife made a quick run with the kids to school and day care, no issues, shut the car down, normal. Then she came home, shut it down went kn the house for a few minutes and re-started the vehicle, put it in reverse and the car no longer felt like working, it cut off leaving the gear selector stuck in reverse. Took it to the certified dealership and surprise, they cannot get the vehicle to reproduce the fault and I'm stuck with this beautifully crafted and designed hunk of...... I'll let you fill in the blank, any other folks out there with this or similar issues???
ACKWARD shutdown sequence
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Hmm that's interesting. Are they any error codes that are being thrown that the dealer could read? If it's not something that can be easily replicated, that could be a pain to try and source. Sounds like you've got an electrical gremlin somewhere in the car. Maybe the best way thing you can do in the interim is try and record footage of these odd occurrences.
If the car is able to power down in gear, that suggests that something is even wrong with its built in safety system. I know its a ridiculous suggestion but have you tried testing the battery with a multimeter? Wonder if there is some sort of parasitic load that's constantly draining power.
If that the case with the battery then an easier test might be to observe unusual activity with the interior/exterior lighting.
First I've heard about intermittent shut offs and this could be a serious safety concern if it happened while you or the wife was driving. Could also just be some sensors relaying the wrong information to the cars computer, but there is an electrical fault somewhere.
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We are having the same issue! I've asked our dealership to keep our car and drive it to recreate the same issue. All they do is keep in the shop over night and tell me everything is good. They just want to close our ticket and move on! This is becoming a huge inconvenience! I live in Texas and now can claim Lemon Law with this car! Our last situation left my wife and young daughter stranded in a vacant parking lot. Not happy with the car or service.
Just let them know where these issues can lead them which ultimately leads to a lawsuit. In that case doing a buy back is far cheaper than shelling out millions.
If you guys aren't getting the proper support from your dealer you should be escalating the issue to corporate. I wouldn't be surprised if your dealer changed their tune if they heard you were looking to invoke Lemon Law with the car. They are going to want to be moving all the current models off lots prior to the 2020 redesign arriving.
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