Left Parking Light and DTR Light warning messages.
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Joined: May 2005
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From: Philadelphia, PA (USA)
2025 E53 Hybrid
Left Parking Light and DTR Light warning messages.
Since the first week of ownership, over a year ago, I have frequently seen two warning messages, "Parking Light Front Left" and "Check Left Daytime Running Light". I frequently checked the lights while the messages were displayed, and in most cases both lights were functioning. Rarely, the parking light was out, but I never observed the DTR lights not working. Of the numerous warnings I was receiving, these seemed to be the least serious. The red Battery Malfunction and Do Not Tow messages were much more alarming.
In August when my EQS SUV was in the shop for the 20K mile service, several software updates were applied. I did not receive a single warning message for 3-1/2 months. Then, beginning on 1-Nov when temperatures dropped I was constantly getting the Parking Light and DTR Light warning messages. Every cold morning when I started the car I would have to clear the error messages by acknowledging them. Then over this weekend temperatures rose to 60F and there were no error messages. This morning with a 35F temperature, the warnings were back.
I took the SUV to the dealership today to determine the root cause. This afternoon I was advised that the front left headlight assembly needs to be replaced. Apparently, individual lights cannot be replaced. I will report back in a few days after the headlight is changed and I confirm that there are no warnings on cold mornings.
In August when my EQS SUV was in the shop for the 20K mile service, several software updates were applied. I did not receive a single warning message for 3-1/2 months. Then, beginning on 1-Nov when temperatures dropped I was constantly getting the Parking Light and DTR Light warning messages. Every cold morning when I started the car I would have to clear the error messages by acknowledging them. Then over this weekend temperatures rose to 60F and there were no error messages. This morning with a 35F temperature, the warnings were back.
I took the SUV to the dealership today to determine the root cause. This afternoon I was advised that the front left headlight assembly needs to be replaced. Apparently, individual lights cannot be replaced. I will report back in a few days after the headlight is changed and I confirm that there are no warnings on cold mornings.
Last edited by LAZARU5; Dec 11, 2023 at 11:19 PM.
Super Member
Joined: Dec 2022
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From: Sweden
2023 EQE SUV 500 4Matic
That's unfortunate. At least they found the root cause.
Do you have the digital headlights? If so, then I guess I can understand why it's not just a "replace the bulb" undertaking.
Do you have the digital headlights? If so, then I guess I can understand why it's not just a "replace the bulb" undertaking.
Thread Starter
MBWorld Fanatic!
Joined: May 2005
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From: Philadelphia, PA (USA)
2025 E53 Hybrid
Yes, they are digital headlights. I suspect that there is a marginal trace on a circuit board that fails when the temperature is close to freezing. I believe there is a core charge for the headlight assembly and it will be refurbished and used for warranty repairs. It's cold enough this week that the tech should be able to confirm that the headlight assembly is the issue no later than the morning after the replacement unit is installed.
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MBWorld Fanatic!
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From: Philadelphia, PA (USA)
2025 E53 Hybrid
Fortunately, the warning messages were still displayed when I arrived at the dealership. Three fault codes were observed during the diagnostics procedures performed on the first day - B1E4D91, B285700, and B266000. If I am reading the invoice correctly, the descriptions for these three codes are: 1) LED Channel output has a malfunction, 2) Output for Standing Light has a malfunction, and 3) Output for Daytime Running Light has a malfunction. In addition to physically replacing the headlight assembly, the software in both the headlight control module and the digital headlamp control unit was updated
Thankfully this was a warranty repair. If this was a post warranty repair the cost would have been $2759 plus Sales Tax ($380 labor, $2379 parts).
Morning temperatures will be below freezing for the next few days, so it should be easy to verify that replacing the headlight assembly resolved the issue since the warning messages only appeared on very cold days.
Thankfully this was a warranty repair. If this was a post warranty repair the cost would have been $2759 plus Sales Tax ($380 labor, $2379 parts).
Morning temperatures will be below freezing for the next few days, so it should be easy to verify that replacing the headlight assembly resolved the issue since the warning messages only appeared on very cold days.
Last edited by LAZARU5; Dec 13, 2023 at 06:59 PM.
Super Member
Joined: Dec 2022
Posts: 751
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From: Sweden
2023 EQE SUV 500 4Matic
Is the warranty in the US 4 years for your car? (I am guessing this because my EQE SUV arrived here in Sweden with a US Warranty & Service booklet, apparently put in the car by accident at the factory. It said 4 years/50,000 miles).
The warranty here, at least for the EQE SUV, is only TWO years. From then on, one would need to buy an extended warranty. Hmmm...I wonder if what you just went through would be covered by a Mercedes Benz extended warranty??
Senior Member
Joined: Mar 2023
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EQE350 SUV 4MATIC
There are no Extended Limited Warranties (ELW) available here in Canada, just the standard 2 year new car warranty, plus 10 year on the battery. You may want to check if ELW is available for your country.
It is ironic that prior to this EV I had refused to even consider getting an extended warranty (do not get it for electronic devices either), but think that is important to have it with this car.. and now it is not available.
It is ironic that prior to this EV I had refused to even consider getting an extended warranty (do not get it for electronic devices either), but think that is important to have it with this car.. and now it is not available.
Thread Starter
MBWorld Fanatic!
Joined: May 2005
Posts: 1,439
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From: Philadelphia, PA (USA)
2025 E53 Hybrid
Yes - that was some good luck you had -- both for diagnostics and warranty covering the cost!
Is the warranty in the US 4 years for your car? (I am guessing this because my EQE SUV arrived here in Sweden with a US Warranty & Service booklet, apparently put in the car by accident at the factory. It said 4 years/50,000 miles).
The warranty here, at least for the EQE SUV, is only TWO years. From then on, one would need to buy an extended warranty. Hmmm...I wonder if what you just went through would be covered by a Mercedes Benz extended warranty??
Is the warranty in the US 4 years for your car? (I am guessing this because my EQE SUV arrived here in Sweden with a US Warranty & Service booklet, apparently put in the car by accident at the factory. It said 4 years/50,000 miles).
The warranty here, at least for the EQE SUV, is only TWO years. From then on, one would need to buy an extended warranty. Hmmm...I wonder if what you just went through would be covered by a Mercedes Benz extended warranty??
1) On page 15 in a section titled, "What is not covered?" lamp units are listed
2) Page 16 includes a list of items specifically excluded from the EW. Among the items one reads, "Light bulbs and LED bulbs (except Xenon Bulbs)."
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Super Member
Joined: Dec 2022
Posts: 751
Likes: 225
From: Sweden
2023 EQE SUV 500 4Matic
There are no Extended Limited Warranties (ELW) available here in Canada, just the standard 2 year new car warranty, plus 10 year on the battery. You may want to check if ELW is available for your country.
It is ironic that prior to this EV I had refused to even consider getting an extended warranty (do not get it for electronic devices either), but think that is important to have it with this car.. and now it is not available.
It is ironic that prior to this EV I had refused to even consider getting an extended warranty (do not get it for electronic devices either), but think that is important to have it with this car.. and now it is not available.
Here in Sweden, the battery warranty on the EQE SUV is 10 years or 250,000 km, whichever comes first.
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