Mercedes SRS light flashing? SRS stands for Supplemental Restraint System, any it is refered as the SRS or Airbag Warning Light. This could be because the AirBag Control Unit is not programmed correctly. SRS Control Unit is not parameterized or as some may refer taught-in. This can cause the blinking of the airbag / SRS light on the instrument cluster. You may have installed an airbag module from another car or the existing module was programmed but not finalized properly. If the VIN doesn’t match or the control unit is not locked, the SRS light will keep on flashing after you start the car. There is high chance that the airbags will not deploy in case of an accident.
In some of the older Mercedes-Benz models, a blinking airbag light could be due to the age of the airbag or loose connections to the airbag components.
If a technician, an auto mechanic or yourself were working recently, you might have accessed the AirBag module and unlocked it to perform programming. You scanner, in most cases the Mercedes-Benz Star DAS Diagnostic C4 or C3 will automatically unlock the control module. When you are done programming the Air Bag control unit you need to CLOSE or Lock It by performing initial start up or parameterization.
It’s important to understand that the correct vehicle identification number (VIN) need to be coded to the Air Bag unit.
Close / Lock SRS AirBag Control unit.
To do this, you will need a Mercedes Benz Star Diagnostic C3 or C4. These scanners are all over eBay; you can see multiple listing here: Mercedes-Benz Star DAS C4 or C3 Diagnostic Software
Or if you prefer you can find the Star DAS Diagnostic C3 or C4 scanners on Amazon as well.
If you have this scanner, you will need to perform an “Initial Startup”
Open up Xentry, which is the software that operates the Star Diagnostic scanners mentioned above. Then go to:
- Control Units > Airbag Module > Look for Initial Startup or Initialization or Adaptation depending on model. > Confirm the VIN number. > Save changes to the control unit. > Wait a few seconds > Turn ignition off> Wait a few seconds and turn ignition on.
Do not perform Initial Startup if there are any fault codes stored or current.
Related SRS Airbag problems.
- Check the belt buckle. The red buckle release on the driver and passenger seat. Loose contact may trigger the airbag light. If the light is triggered it will stay ON and needs to be reset using one of the scanners below.
- Steering Wheel Clockspring Ring. Can cause the AirBag / SRS light to stay on.
- Low voltage can trigger the Airbag / SRS light as well.
- Child seat recognition sensor in front passenger seat.
You can read the codes that have triggered the airbag light using a scanner that can read the SRS AirBag control unit on your Mercedes-Benz. One scanner that will work and is affordable is the YOUCANIC full system scanner.
Plug in this scanner on the OBD II port found under the dashboard on the driver side. Hit Read on the scanner. Once the codes display on the LCD screen, hit erase. It’s that easy. Note that if the problem that caused the AirBag / SRS light to come on in the first place is not resolved, the Airbag / SRS light will come back on.
Frequently Asked Questions
What does it mean when the SRS light is on?
That means there is a fault in your SRS Airbag control unit also known as the safety restraint system. The airbags may not deploy in case of an accident.
What does the SRS light stand for in a Mercedes-Benz car?
Supplemental Restraint System