Whats up with these remote batteries???
Super Member
Joined: Aug 2004
Posts: 954
Likes: 245
E550 Coupe 2wd (2016)
Cali: My car no longer goes to sleep, period. My key is usually within 20' of the car. Should I assume my key never sleeps either?
I ask because I'm curious if my redneck fix is enough to last with all this transmitting, or maybe my key is simply not transmitting? I don't have anything that reads that small of a current draw so I can't check it, I can only guesstimate via battery life.
I ask because I'm curious if my redneck fix is enough to last with all this transmitting, or maybe my key is simply not transmitting? I don't have anything that reads that small of a current draw so I can't check it, I can only guesstimate via battery life.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
sleeplessness 🫤
Cali: My car no longer goes to sleep, period. My key is usually within 20' of the car. Should I assume my key never sleeps either?
I ask because I'm curious if my redneck fix is enough to last with all this transmitting, or maybe my key is simply not transmitting? I don't have anything that reads that small of a current draw so I can't check it, I can only guesstimate via battery life.
I ask because I'm curious if my redneck fix is enough to last with all this transmitting, or maybe my key is simply not transmitting? I don't have anything that reads that small of a current draw so I can't check it, I can only guesstimate via battery life.
I suggest you do a REBOOT to sanitize your sleepless SAM's.
Scan for faulty modules that can upset entering sleep or extend periodical polling loop: "parking drain".
Sleep is really just a managed low power mode...
🤞
Super Member
Joined: Aug 2004
Posts: 954
Likes: 245
E550 Coupe 2wd (2016)
Cali; I have rebooted it many times, including disconnecting the rear battery just to be double sure. The only thing rebooting has ever done for me is F up my left rear window memory, which is usually not easy to reset.
Since I had that Rat issue, and Xentry had no codes suggesting a problem, I scanned all the modules. When I scanned it last, everything looked ok except some Eng On and Off timers were clearly wrong, and a CAN awake issue? The rear SAM said voltage was 65.
Now I have a new code; P2610. Apparently that means the car cannot tell how long the engine has been Off. I guess what it means to say it's been On so long it can't keep track?
Since I had that Rat issue, and Xentry had no codes suggesting a problem, I scanned all the modules. When I scanned it last, everything looked ok except some Eng On and Off timers were clearly wrong, and a CAN awake issue? The rear SAM said voltage was 65.
Now I have a new code; P2610. Apparently that means the car cannot tell how long the engine has been Off. I guess what it means to say it's been On so long it can't keep track?
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Cali; I have rebooted it many times, including disconnecting the rear battery just to be double sure. The only thing rebooting has ever done for me is F up my left rear window memory, which is usually not easy to reset.
Since I had that Rat issue, and Xentry had no codes suggesting a problem, I scanned all the modules. When I scanned it last, everything looked ok except some Eng On and Off timers were clearly wrong, and a CAN awake issue? The rear SAM said voltage was 65.
Now I have a new code; P2610. Apparently that means the car cannot tell how long the engine has been Off. I guess what it means to say it's been On so long it can't keep track?
Since I had that Rat issue, and Xentry had no codes suggesting a problem, I scanned all the modules. When I scanned it last, everything looked ok except some Eng On and Off timers were clearly wrong, and a CAN awake issue? The rear SAM said voltage was 65.
Now I have a new code; P2610. Apparently that means the car cannot tell how long the engine has been Off. I guess what it means to say it's been On so long it can't keep track?
It could be the normally sleepless power manager aka. F-SAM telling stories to ECU.
The Door Control modules are particularly poor with unsoldered pins and buggy software. They help provide regular troubles on CAN-B to bug down Keyless and R-SAM... battery drain.
In the end low voltage is good for nothing. You can tackle as many issues as you want to clear things out.
Resets and Reboot are temporary troubleshooting steps, not fixes.
You know the old sayin': "Think globally, act locally!"
Same thing with MB Chassis: concider all the faults together as they relate but then fix them one by one.
🤞
Last edited by CaliBenzDriver; Nov 6, 2023 at 07:33 PM.
