Q: DTC Code interpretation

asked by on

2009 Benz C300 4DR Sports automatic transmission code scanner Yes

Issues: 1. "Auto lights inoperative" error message 2, Interior buttons has no lights during a night drive.

DTC errors 1. A25f54 2. D41e00

Code findings 1. circuit 58d off and 0mA consumption 2. ambient illuminationoff 3. headlamp switch off delay off

Questions to experts 1. is circuit 58d off means faulty? what and where is circuit 58d parts if this need to be replaced is your recoomendation 2, ambient illumination off is faulty ? then how to fix? 3. head lamp switch off delay off is faulty? then how to fix? 4. command center (Radio) under engineer mode, I can change illumination from 0-100%, but then I do not know to how to save the setting, how do I save the current setting (100% illumination ) when I get out of engineer mode? 5. Auto lights inoperative" error message---how do I fix this? 2, Interior buttons has no lights during a night drive.--- how do I fix this? is this error due to all these faulty codes tha

My car has 75000 miles.
My car has an automatic transmission.

It looks like you’re using the Star Diagnostic system. So you are getting Mercedes Proprietary codes. The codes may not be published in a place where you can access them without going through Mercedes. They guard a lot of their intellectual property pretty jealously. As for Circuit 58D, it is not a component, it is the instrument illumination circuit itself; the network of wires and devices that run through the car lighting up things like window switches. In the old days I would say replace the dimmer switch, but things are much more complicated these days. The only thing left for you is to get a wiring diagram and a multimeter and start testing. You will find the Circuit 58D terminals on several devices including the light switch and the lighting module. If you don’t want to spend your day upside down under the dashboard. You can contact Your Mechanic to have a technician come out to your home or office to check out your electrical system and tell you what its going to take to fix it.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. DTC Code interpretation

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Can a loose gas cap or driving on really rough roads cause a P0193 error code?

Hi there, thanks for writing in. To answer your question in a simple way: maybe. The P-0193 OBD-II error code is as you indicated, a fuel rail pressure sensor circuit issue. This may have been triggered by the aggressive off-road...

Q: I scanned my mercedes ML 250 CDI 4Matic W166 with icarsoft MB 2 scanner. Its showing trouble code U144f00. What does it mean ?

The fault being reported is within a Controller Area Network (CAN) function (wiring or device) but the code itself is generic. According to MB, the particular scanner that you are using will have an accompanying description of the code as...

Q: Back doors not opening

If the locks do not operate for the back doors, I would suspect a blown fuse. Otherwise, the master switch in the driver's door may have to be replaced. A diagnostic is required to determine the exact issue with your...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...