WTF....car keeps dying if I don't lock it for few hours. It's fine if locked...?

mjr24 · 12-13-2023, 03:31 AM

My M8 has now died 3-4 times in the last few days and I have narrowed it down to it only happening when I don't lock the car and leave it for a few hours. However, if I lock the car....it's totally fine...even overnight.

What could be going on?

Funny this is when I hook up the jumper cables from my M8 to our X7, it comes on immediately (even without starting either car). Then it starts fine.

m3_08 · 12-13-2023, 06:54 AM

i use 'lock when walk away' feature and I drive only once in 10-14 days (like 10-14 miles). No problems.
The fact that jumper connection is enough to start the car would lead me it is not a battery but some electronics around it. Dealer visit and leave it there for 2-3 days?

mjr24 · 12-13-2023, 04:04 PM

Quote:

Originally Posted by m3_08

i use 'lock when walk away' feature and I drive only once in 10-14 days (like 10-14 miles). No problems.
The fact that jumper connection is enough to start the car would lead me it is not a battery but some electronics around it. Dealer visit and leave it there for 2-3 days?

Yeah going to have to….

12-13-2023, 03:31 AM	#1
mjr24 Colonel 1657 Rep 2,405 Posts Drives: M8 Comp GC, X7, AMG GT53 Join Date: Mar 2008 Location: Wisconsin iTrader: (0)	WTF....car keeps dying if I don't lock it for few hours. It's fine if locked...? My M8 has now died 3-4 times in the last few days and I have narrowed it down to it only happening when I don't lock the car and leave it for a few hours. However, if I lock the car....it's totally fine...even overnight. What could be going on? Funny this is when I hook up the jumper cables from my M8 to our X7, it comes on immediately (even without starting either car). Then it starts fine. __________________ 2022 M8 Comp GC, 2021 AMG GT53, 2022 X5M Competition, 2021 X7 40i, 2019 M5, 2018 M550I, 2017 Audi Q7, 2014 M6 GC, 2013 Mercedes CLS550, 2011 750LI, 2008 M6 Cabrio, 2008 Porsche Cayenne S, 2004 Mercedes SL55 AMG, 2003 Mercedes SL500, 2000 Mercedes CL500, 1993 Lexus SC400, 1989 525i, 1985 318i
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12-13-2023, 06:54 AM	#2
m3_08 Lieutenant 609 Rep 534 Posts Drives: 2023 M8 conv, IX M60, model Y Join Date: May 2015 Location: ATL iTrader: (0)	i use 'lock when walk away' feature and I drive only once in 10-14 days (like 10-14 miles). No problems. The fact that jumper connection is enough to start the car would lead me it is not a battery but some electronics around it. Dealer visit and leave it there for 2-3 days?
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