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W463A 2019 G63 inoperative messages keep popping up

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Old Feb 16, 2020 | 05:33 AM
  #1  
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W463A 2019 G63 inoperative messages keep popping up

Hi everyone,

I have just bought a second hand 2019 G63 (reg in August 2019) last week, with 7800 miles on clock, however everyday when I drive the car there is a chance of function inoperative messages popping up, they are 5 in total and are all the same every time.. thought it was ABS wheel speed sensor problem so today I took it to a garage to have a look by OBD diagnostic, but after clearing the faulty codes all seems to be fine in the second run, no any more faulty code whatsoever.. and the messages showed up again on my way back home.

Those malfunction messages are:
1. Active Lane Keeping Assist inoperative
2. Active Distance Assist inoperative
3. Active Brake Assist Functions limited see owners manual
4. Blind Spot Assist inoperative
5. ESP(icon) inoperative see owners manual

They actually deactivates my car‘s ESP, distronic and start/stop function, the buttons for these features also die.



May I ask how a car with no more than 8k miles and half year old can have this problem? It seems serious. Could anyone help me to diagnose where the problem is? Luckily the car has warrenty, but unless I point out where the problem is (which part of the car is wrong), the main dealer won‘t deal with it since in the past times I went to them with my former car they just told me to demonstrate the problem to their engineer otherwise they will keep saying they cannot find anything wrong! Regarding this G63’s faulty messages, they dissapear when I re-start the car so no-way can the dealer find the messages unless they keep driving it (free G63 drive around??)
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Old Feb 16, 2020 | 09:00 AM
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2018 G63
This sounds very serious and one can see a very real potential for an accident if this occurred in traffic. It is hard to imagine that a real time video by you of this happening wouldn’t spot MB to take this seriously. Have you called the national MB customer care number? This cannot be an issue they will ignore. Please keep posting how this works out.
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Old Feb 16, 2020 | 09:34 AM
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Have you ever ‘jump started’ this car or has anybody used a battery pack to start it??

I ask this because my parents had a similar issue as this and it was because the dealer ship had used a battery pack to start the car and it blew the ecu. This was in a gle. It had odd error messages and the heater stopped working. The dealership said it was common for this to happen as they often have to use battery packs.

Just a thought.
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Old Feb 16, 2020 | 09:50 AM
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Just had the same issue intermittently over the last month especially after cold weather starts. Only happens when you start the car as the modules are initializing. Car was also giving a low battery warning and dealer initially thought it maybe related to low voltage at startup but it continued after the auxiliary battery was replaced. Issue finally resolved after replacement of a “Differential Module” last week.

Last edited by haa; Feb 16, 2020 at 09:56 AM.
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Old Feb 16, 2020 | 12:49 PM
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Originally Posted by haa
Just had the same issue intermittently over the last month especially after cold weather starts. Only happens when you start the car as the modules are initializing. Car was also giving a low battery warning and dealer initially thought it maybe related to low voltage at startup but it continued after the auxiliary battery was replaced. Issue finally resolved after replacement of a “Differential Module” last week.
Mine also pops up during the drive so it‘s a bit more dangerous, no battery warnings as well. Very wierd
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Old Feb 16, 2020 | 12:51 PM
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Originally Posted by Bexlee
Have you ever ‘jump started’ this car or has anybody used a battery pack to start it??

I ask this because my parents had a similar issue as this and it was because the dealer ship had used a battery pack to start the car and it blew the ecu. This was in a gle. It had odd error messages and the heater stopped working. The dealership said it was common for this to happen as they often have to use battery packs.

Just a thought.
That is possible, but my car works all fine except when these massages and malfunctions come up
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Old Feb 16, 2020 | 12:51 PM
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Originally Posted by Mopars
This sounds very serious and one can see a very real potential for an accident if this occurred in traffic. It is hard to imagine that a real time video by you of this happening wouldn’t spot MB to take this seriously. Have you called the national MB customer care number? This cannot be an issue they will ignore. Please keep posting how this works out.
Definitely will do bro.
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Old Feb 16, 2020 | 02:05 PM
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My 2019 has done this from time to time on start up. maybe 3x in total. Seems to be related to when the car is recently washed, or if its parked in tight quarters when started. Haven't not seen it enough to have more comprehensive analysis, however, it resolves on a restart. I actually just turn off the ignition and restart it at a stop light and it goes away. Very odd and I plan to bring it up when I bring to dealer.
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Old Feb 17, 2020 | 07:39 AM
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Originally Posted by drew138
My 2019 has done this from time to time on start up. maybe 3x in total. Seems to be related to when the car is recently washed, or if its parked in tight quarters when started. Haven't not seen it enough to have more comprehensive analysis, however, it resolves on a restart. I actually just turn off the ignition and restart it at a stop light and it goes away. Very odd and I plan to bring it up when I bring to dealer.
That’s how it started for me then it became more frequent and sometimes would not go away with restarting until I had driven for a while and the car had warmed up. Anyways have not seen it again since the “differential module” was replaced.
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Old Feb 19, 2020 | 03:03 PM
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mercedes g63
Check brake light switch at dealer

Originally Posted by TomJ9043
Hi everyone,

I have just bought a second hand 2019 G63 (reg in August 2019) last week, with 7800 miles on clock, however everyday when I drive the car there is a chance of function inoperative messages popping up, they are 5 in total and are all the same every time.. thought it was ABS wheel speed sensor problem so today I took it to a garage to have a look by OBD diagnostic, but after clearing the faulty codes all seems to be fine in the second run, no any more faulty code whatsoever.. and the messages showed up again on my way back home.

Those malfunction messages are:
1. Active Lane Keeping Assist inoperative
2. Active Distance Assist inoperative
3. Active Brake Assist Functions limited see owners manual
4. Blind Spot Assist inoperative
5. ESP(icon) inoperative see owners manual

They actually deactivates my car‘s ESP, distronic and start/stop function, the buttons for these features also die.



May I ask how a car with no more than 8k miles and half year old can have this problem? It seems serious. Could anyone help me to diagnose where the problem is? Luckily the car has warrenty, but unless I point out where the problem is (which part of the car is wrong), the main dealer won‘t deal with it since in the past times I went to them with my former car they just told me to demonstrate the problem to their engineer otherwise they will keep saying they cannot find anything wrong! Regarding this G63’s faulty messages, they dissapear when I re-start the car so no-way can the dealer find the messages unless they keep driving it (free G63 drive around??)

I experienced the same problem —-it was an easy fix —-have the dealer check for “brake light switch “ adjustment. Mine was fixed in a couple hourss...Cheers. It is a know problem
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Old Feb 20, 2020 | 09:57 AM
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Originally Posted by CDHG63
I experienced the same problem —-it was an easy fix —-have the dealer check for “brake light switch “ adjustment. Mine was fixed in a couple hourss...Cheers. It is a know problem
I have asked an MB engineer in Shanghai few days ago, what he told me is exactly you posted here, he said I don‘t even need to go to the dealer, can fix it will a screw driver and a 1 pound coin. Just to fit the coin to a 2.5mm gap in the brake light switch. **** MB is poor quality nowadays.
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Old Feb 20, 2020 | 02:10 PM
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Where exactly is the brake light switch?
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Old Feb 20, 2020 | 02:14 PM
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No more MB:(
I've had the auxiliary battery go bad on two late model Benz's and both times I got the same messages. Check the aux battery.
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Old Feb 20, 2020 | 08:01 PM
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Originally Posted by drew138
Where exactly is the brake light switch?
Just inside the plastic cover on top of the brake pad.
need to screw some nails off to remove the cover.
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Old Feb 20, 2020 | 08:03 PM
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Originally Posted by places
I've had the auxiliary battery go bad on two late model Benz's and both times I got the same messages. Check the aux battery.
Mine messages only appear when tapping on the brake, so I assume it’s the brake light switch problem... if that cannot solve it, I will check the auxiliary battery then :-D
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Old Dec 5, 2020 | 02:23 PM
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G wagon
G350 same issue - help please :)

Hello everyone,

I have a G350 w463 (2019 September), with the exact same problem since the winter of 2019. I took it to my dealership’s service twice, they said this was software issue and updated it twice. (Funny enough the dealership had received five g wagons with the same issue)

The problem seemed to be fine for a while. But the messages returned shortly after. I managed to cope 2019 december to 2020 march with it since they cleared and all functions seemed to work as soon as I restarted the engine; however i kept getting the warnings once every one or two weeks.

Somehow I did not have a single warning message during the summer.

The messages have returned since this autumn (2020) and they are much more frequent. I had it six times today! They were all very short drives and the car was mostly cold, that might explain.

I have no technical knowledge of cars so I was a bit afraid to unscrew the brake pad box. I hope you guys can help me out. To be honest I even shared this forum link with the service manager of the dealership.
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Old Dec 6, 2020 | 09:49 AM
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There are a couple recalls for this, some of it is due to the wiring in the door recall and some of it maybe due to the differential lock module recall. Not sure I remember which one was throwing what errors
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Old Dec 6, 2020 | 11:10 AM
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I had differential lock module replaced but it popped up
the other day after short cold drive randomly. Need to get it looked at
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Old Dec 6, 2020 | 11:55 AM
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When my 2019 starts misbehaving such as this, it will be sold to someone with time to hang around the dealership customer lounge drinking bad espresso.
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Old Dec 6, 2020 | 01:11 PM
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Originally Posted by streborx
When my 2019 starts misbehaving such as this, it will be sold to someone with time to hang around the dealership customer lounge drinking bad espresso.
Lol, it’s not that bad - especially what I’ve experienced with my range rovers
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Old Dec 6, 2020 | 01:35 PM
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Originally Posted by Festertester
Lol, it’s not that bad - especially what I’ve experienced with my range rovers
The WSJ's gear-head Dan Neil offered a less than enthusiastic review this weekend of the new $71K RR/LR Defender 110 P400 SE. Their other gear-head, A.J. Baime, featured a 2015 Ferrari 458 Spider in Platinum -- am in love.
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