My C43 stalled on its own at idle.
Junior Member
Joined: Apr 2022
Posts: 15
Likes: 1
From: Portland, OR
2018 C 43 AMG
My 2018 C43 has stalled twice in two days
I am seeing similar issues that everyone is seeing here, so far I've seen it twice with very similar conditions.
Back to back... This happened on Sunday, and today (Monday)
Pre-conditions:
I have ECO Start/Stop feature button turned on.
First time:
From Cold start (first drive for the day), driving about 10 mins.
I also made it through quite a few lights before I was forced to stop. Once again I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
Second time:
From Cold start (first drive for the day), drove to the gas station 5 mins away. Stopped and filled up gas.
Started up and made it through about 5-6 lights before I was forced to stop and hold the break. I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
So far I think it has to do with ECO Start/Stop, and my current data says that it might be within the first 15-20 mins before the engine is fully warmed up?
Does anyone have any advice?
My car is out of warranty, there's no recall for this, how do I approach the dealer in getting ECU updates?
Back to back... This happened on Sunday, and today (Monday)
Pre-conditions:
I have ECO Start/Stop feature button turned on.
First time:
From Cold start (first drive for the day), driving about 10 mins.
I also made it through quite a few lights before I was forced to stop. Once again I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
Second time:
From Cold start (first drive for the day), drove to the gas station 5 mins away. Stopped and filled up gas.
Started up and made it through about 5-6 lights before I was forced to stop and hold the break. I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
So far I think it has to do with ECO Start/Stop, and my current data says that it might be within the first 15-20 mins before the engine is fully warmed up?
Does anyone have any advice?
My car is out of warranty, there's no recall for this, how do I approach the dealer in getting ECU updates?
Thread Starter
Junior Member
Joined: Jan 2018
Posts: 35
Likes: 4
From: Toronto
2017 C43 AMG
I probably mentioned in my previous posts.
The issue has been resolved and never happened again after I changed the battery.
Nothing fancy, it was just a CAA battery
The issue has been resolved and never happened again after I changed the battery.
Nothing fancy, it was just a CAA battery
I am seeing similar issues that everyone is seeing here, so far I've seen it twice with very similar conditions.
Back to back... This happened on Sunday, and today (Monday)
Pre-conditions:
I have ECO Start/Stop feature button turned on.
First time:
From Cold start (first drive for the day), driving about 10 mins.
I also made it through quite a few lights before I was forced to stop. Once again I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
Second time:
From Cold start (first drive for the day), drove to the gas station 5 mins away. Stopped and filled up gas.
Started up and made it through about 5-6 lights before I was forced to stop and hold the break. I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
So far I think it has to do with ECO Start/Stop, and my current data says that it might be within the first 15-20 mins before the engine is fully warmed up?
Does anyone have any advice?
My car is out of warranty, there's no recall for this, how do I approach the dealer in getting ECU updates?
Back to back... This happened on Sunday, and today (Monday)
Pre-conditions:
I have ECO Start/Stop feature button turned on.
First time:
From Cold start (first drive for the day), driving about 10 mins.
I also made it through quite a few lights before I was forced to stop. Once again I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
Second time:
From Cold start (first drive for the day), drove to the gas station 5 mins away. Stopped and filled up gas.
Started up and made it through about 5-6 lights before I was forced to stop and hold the break. I did not use the HOLD feature.
ECO Start/Stop did not initiate (it usually doesn't initiate on the first or even second idle at a stop light).
The engine stayed on, and when I let go of the brake, and attempted to accelerate the car stalled. and all the dash lights came on.
At this point I Hit the Engine Start/Stop once to turn it off, and again to initiate the starter motor for an Engine Start.
So far I think it has to do with ECO Start/Stop, and my current data says that it might be within the first 15-20 mins before the engine is fully warmed up?
Does anyone have any advice?
My car is out of warranty, there's no recall for this, how do I approach the dealer in getting ECU updates?
Junior Member
Joined: Apr 2022
Posts: 15
Likes: 1
From: Portland, OR
2018 C 43 AMG
It worked fine up until this weekend, and today with Eco Start/stop off, no issues.
I'm not a fan of dropping $200 every few months, but I will have the battery tested. It seems that this AGM battery tech isn't as great as they claim it is.
