Check engine light from bumper work?
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 19
Likes: 1
C300
Check engine light from bumper work?
2023 RWD C300
I was parked in a school parking lot and a student backed into me and hit my rear bumper.
Brought it to MAACO. Just was getting the bumper painted with insurance.
They've had the car for almost 2 weeks. They left the trunk open which drained the battery to critical. The red lights on the app are all around the car, the 4 doors and the back. The doors have said unlocked since they've had the car.
Now, they called me today and said the check engine light is on. What the hell did they do? They are getting an outside scanner to check the check engine light. This has been a comedy of errors.
I was parked in a school parking lot and a student backed into me and hit my rear bumper.
Brought it to MAACO. Just was getting the bumper painted with insurance.
They've had the car for almost 2 weeks. They left the trunk open which drained the battery to critical. The red lights on the app are all around the car, the 4 doors and the back. The doors have said unlocked since they've had the car.
Now, they called me today and said the check engine light is on. What the hell did they do? They are getting an outside scanner to check the check engine light. This has been a comedy of errors.
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Joined: Oct 2019
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From: Colorado
G550
The battery might be depleted to the point of being incapable of starting the car. Buy or borrow a charger -- 10 amps will work faster than a 1 - 2 amp maintainer. Let the battery charge for a full day, and the car should start. Go to an auto store and have the battery checked, and borrow an OBD scanner if the CEL needs to be reset.
Why has it taken 2 weeks to do a bumper repair, and why didn't the repair shop connect a charger while working on it?
Why has it taken 2 weeks to do a bumper repair, and why didn't the repair shop connect a charger while working on it?
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 19
Likes: 1
C300
The battery might be depleted to the point of being incapable of starting the car. Buy or borrow a charger -- 10 amps will work faster than a 1 - 2 amp maintainer. Let the battery charge for a full day, and the car should start. Go to an auto store and have the battery checked, and borrow an OBD scanner if the CEL needs to be reset.
Why has it taken 2 weeks to do a bumper repair, and why didn't the repair shop connect a charger while working on it?
Why has it taken 2 weeks to do a bumper repair, and why didn't the repair shop connect a charger while working on it?
They are charging $250 for the scanner that works with Mercedes software, that’s going to the outside company who has the appropriate equipment. (Master ADAS)
…at the moment, there is no battery warning, it just says doors are unlocked and I see the picture with the red all around the car…plus the check engine light.
Last edited by jr33; Jul 26, 2025 at 10:13 AM.
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Thread Starter
Junior Member
Joined: Mar 2024
Posts: 19
Likes: 1
C300
I believe insurance is paying. Huge ripoff either way. As far as I know, the car starts. I’m wondering if the check engine light will fix itself as the car returns to normal use. And if they destroyed the battery.
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