2012 E350 , all systems inoperable, then repeat startup and problem resolves??
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 16
Likes: 2
2012 Mercedes E350 4Matic
2012 E350 , all systems inoperable, then repeat startup and problem resolves??
Hi all,
Wondering if anyone has had this problem , or any ideas or clues as to what's causing it.
I approach the vehicle and open the trunk, load trunk with something. Then the close trunk and lock trunk buttons are not illuminated and trunk does not close. Instrument cluster has displayed "Key detected in vehicle" at times.
Trunk is closed manually, then upon starts, air conditioning is not working, instrument cluster displays "ESP inoperable" , "blind spot detection inoperable" , "srs malfunction , see dealer" . Basically every error message stating systems are inoperable. Car will not engage into drive.
Then, I turn off the car, lock and wait until lights time out. Repeat this a few times getting in and out and attempting start. After about 4th try, it starts and everything is fine. Only check engine light is displayed.
Car starts fine after that, even when unloading and loading trunk, everything functional. Then check engine light disappears.
Approx 3 days later, it happened again. I'm really confused (so weird). Maybe a proximity sensor near the back of the vehicle is defective and it thinks someone is trying to steal the car (not detecting key) , or ignition sequence is out of whack.
I've also bought a new battery about 2 weeks ago, thinking that was the issue, but still it remains.
Any feedback would be greatly appreciated, thank you my fellow W212 owners! I still love this car no matter what.
Wondering if anyone has had this problem , or any ideas or clues as to what's causing it.
I approach the vehicle and open the trunk, load trunk with something. Then the close trunk and lock trunk buttons are not illuminated and trunk does not close. Instrument cluster has displayed "Key detected in vehicle" at times.
Trunk is closed manually, then upon starts, air conditioning is not working, instrument cluster displays "ESP inoperable" , "blind spot detection inoperable" , "srs malfunction , see dealer" . Basically every error message stating systems are inoperable. Car will not engage into drive.
Then, I turn off the car, lock and wait until lights time out. Repeat this a few times getting in and out and attempting start. After about 4th try, it starts and everything is fine. Only check engine light is displayed.
Car starts fine after that, even when unloading and loading trunk, everything functional. Then check engine light disappears.
Approx 3 days later, it happened again. I'm really confused (so weird). Maybe a proximity sensor near the back of the vehicle is defective and it thinks someone is trying to steal the car (not detecting key) , or ignition sequence is out of whack.
I've also bought a new battery about 2 weeks ago, thinking that was the issue, but still it remains.
Any feedback would be greatly appreciated, thank you my fellow W212 owners! I still love this car no matter what.
Last edited by RealVanCity; Aug 2, 2019 at 12:32 AM.
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Joined: Oct 2005
Posts: 4,957
Likes: 1,640
See the following thread. Can failure from corroded blind spot sensor. Not saying that’s it but you have similar issues happening and these sensors are known to cause problems with the Can.
https://mbworld.org/forums/e-class-w...-meltdown.html
https://mbworld.org/forums/e-class-w...-meltdown.html
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 16
Likes: 2
2012 Mercedes E350 4Matic
See the following thread. Can failure from corroded blind spot sensor. Not saying that’s it but you have similar issues happening and these sensors are known to cause problems with the Can.
https://mbworld.org/forums/e-class-w...-meltdown.html
https://mbworld.org/forums/e-class-w...-meltdown.html
Thank you!, I'll dig deeper. Much appreciated
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Hi all,
Wondering if anyone has had this problem , or any ideas or clues as to what's causing it.
I approach the vehicle and open the trunk, load trunk with something. Then the close trunk and lock trunk buttons are not illuminated and trunk does not close. Instrument cluster has displayed "Key detected in vehicle" at times.
Trunk is closed manually, then upon starts, air conditioning is not working, instrument cluster displays "ESP inoperable" , "blind spot detection inoperable" , "srs malfunction , see dealer" . Basically every error message stating systems are inoperable. Car will not engage into drive.
Then, I turn off the car, lock and wait until lights time out. Repeat this a few times getting in and out and attempting start. After about 4th try, it starts and everything is fine. Only check engine light is displayed.
Car starts fine after that, even when unloading and loading trunk, everything functional. Then check engine light disappears.
Approx 3 days later, it happened again. I'm really confused (so weird). Maybe a proximity sensor near the back of the vehicle is defective and it thinks someone is trying to steal the car (not detecting key) , or ignition sequence is out of whack.
I've also bought a new battery about 2 weeks ago, thinking that was the issue, but still it remains.
Any feedback would be greatly appreciated, thank you my fellow W212 owners! I still love this car no matter what.
Wondering if anyone has had this problem , or any ideas or clues as to what's causing it.
I approach the vehicle and open the trunk, load trunk with something. Then the close trunk and lock trunk buttons are not illuminated and trunk does not close. Instrument cluster has displayed "Key detected in vehicle" at times.
Trunk is closed manually, then upon starts, air conditioning is not working, instrument cluster displays "ESP inoperable" , "blind spot detection inoperable" , "srs malfunction , see dealer" . Basically every error message stating systems are inoperable. Car will not engage into drive.
Then, I turn off the car, lock and wait until lights time out. Repeat this a few times getting in and out and attempting start. After about 4th try, it starts and everything is fine. Only check engine light is displayed.
Car starts fine after that, even when unloading and loading trunk, everything functional. Then check engine light disappears.
Approx 3 days later, it happened again. I'm really confused (so weird). Maybe a proximity sensor near the back of the vehicle is defective and it thinks someone is trying to steal the car (not detecting key) , or ignition sequence is out of whack.
I've also bought a new battery about 2 weeks ago, thinking that was the issue, but still it remains.
Any feedback would be greatly appreciated, thank you my fellow W212 owners! I still love this car no matter what.
Next thing to do is to replace the AUXILLIARY battery.
If AUX battery change does not help replace your starter.
MBWorld Fanatic!
Joined: Dec 2001
Posts: 5,583
Likes: 210
From: Washington D.C.
2024 GLE63s / 2016 GLE63s (traded) / 2016 E63s / 2002 E55
I have a Trickle Charger Battery Maintainer. Will the Auxiliary Battery charge along with charging the Main Battery? I just got warning message "Auxiliary Battery Malfunction". Thanks.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
My thinking is- if it is directly connected in parallel with the main battery then why have two different batteries? Would be cheaper to make the car with one battery that has bigger capacity than two separate ones. Would save all wiring etc. costs...
MBWorld Fanatic!
Joined: Jan 2012
Posts: 1,043
Likes: 310
From: NYC
E63S
I once asked this question in the AMG forum and PeterUbers (a member who seems pretty knowledgeable) said the trickle charger will NOT charge the AUX batt.
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