MB Medic Mercedes-Benz Repair Guides, Service, How To DIY
Is your Mercedes-Benz greeting you with an “SOS TeleAid not Activated” or “SOS Defective Please Visit Workshop” warning on your Instrument Cluster? Many early Mercedes-Benz TeleAid systems relied on legacy cellular technology that is no longer supported in the United States. As a result, some vehicles may display TeleAid-related warnings even though the vehicle itself has no mechanical problem. However, a TeleAid malfunction message can also indicate an actual fault in the TeleAid system, so the vehicle should be diagnosed before disabling the system. Important: Mercedes-Benz mbrace connected vehicle services were discontinued in the United States on January 1, 2026. Therefore, upgrading an older TeleAid system to mbrace is no longer a current solution for restoring Mercedes-Benz connected services.
You can disable this warning message from displaying on your Instrument Cluster.
- Disable TeleAid in your Mercedes-Benz using the Star Diagnostic Tool
. Instructions on how to program the TeleAid Unit are included below. - Older TeleAid-equipped vehicles may have had an upgrade path to later Mercedes-Benz connected services, depending on the vehicle and market. Check current Mercedes-Benz support for your specific vehicle before assuming an upgrade is available.
. Instructions on how to program the TeleAid Unit are included below.What is TeleAid SOS?
TeleAid is an emergency response system. TeleAid connects you to a live person at the Mercedes-Benz roadside assistance center, available 24/7. It connects the driver to Mercedes-Benz roadside assistance using cellular technology and GPS to locate your vehicle. The TeleAid system is also used to send crash data in case of an accident. TeleAid does require a subscription. The Federal Communications Commission ruled that after February of 2008, wireless phone carriers, which TeleAid utilizes for communication, are no longer required to provide analog network support. TeleAid depends on both cellular communication and GPS information. A vehicle may therefore have a functioning TeleAid control unit but still be unable to complete an emergency call or transmit vehicle-location information if the required network or GPS signals are unavailable. This requirement made the TeleAid system obsolete. For this reason, we have included instructions on how to clear the TeleAid SOS warning with the STAR Diagnostic tool
. In case you are wondering, Star Diagnostic is the scanner that the dealer uses to troubleshoot any system in your car, and it is specific to Mercedes-Benz cars. These units are pricey but well worth it if you can afford one. You can buy one on Amazon; link here.
If you don’t have access to the Star Diagnostic Tool, you can have your Mercedes-Benz dealer perform DTB P-B-82.95/636a, 03/24/2009 Supersedes: P-B-82.95/636 dated Oct. 29, 2008 “Instrument Cluster Message – “SOS TeleAid not Activated”
SRS Airbag Defective Warning could be triggered when the TeleAid malfunction is displayed. On some models, disabling or removing TeleAid can cause the SRS/airbag control unit to store a related fault because the vehicle configuration still expects the TeleAid system to be present. After changing the TeleAid configuration, scan the SRS/airbag control unit and address any resulting configuration-related DTCs according to the vehicle’s diagnostic documentation.
Disable TeleAid SOS Malfunction Warning using Mercedes-Benz Star Diagnostic
Using Star Diagnostic, you will need to change TeleAid coding from PRESENT to NOT PRESENT. By using these instructions, disabling TeleAid/E-Call removes the vehicle’s ability to use that system for emergency, roadside-assistance, and information calls. Do not disable the system if you rely on it for emergency assistance. Always verify that the vehicle’s emergency-call system is functioning before considering this procedure. Diagnostic menu names may vary depending on the STAR/XENTRY software version and vehicle equipment. The procedure below applies only to the listed vehicle platforms and should not be assumed to apply to other Mercedes-Benz models.
- Model 203, 209, 210 C CLK E Class: In Star Diagnosis: Control Units –> Information and communication –> ICM – Instrument cluster with maintenance interval display –> Troubleshooting using complaints or symptoms –> Messages from the emergency call system are displayed in the instrument cluster.
- Model 211 E Class: In Star Diagnosis: Control Units –> Body –> CGW (Central Gateway) –> Control Unit Adaptations –> Read Coding and Change if Necessary –> Telecommunications –> Telematics Service “Tele Aid” in combination with MOST technology.
- Model 220 S Class: In Star Diagnosis, please navigate through the following menus: Control Units –> Information and communication –> ICM – Instrument cluster with maintenance interval display –> Control unit adaptations –> Variant Coding –> Special Equipment –> TELE AID or E-Call
TeleAid Buttons in a Mercedes-Benz
In your Mercedes-Benz, you have three buttons. They will only work if you have a TeleAid or Mercedes-Benz mbrace subscription. Here is what their purpose is:
SOS button – use if you need emergency aid.
The “i” button is used if you need information
Wrench button – Use it if you need Emergency Roadside Assistance
Can I continue TeleAid Service?
Yes. To use the TeleAid service, you must upgrade your analog TeleAid unit to a digital One. Most likely at your own cost. Ask your Mercedes – Benz dealer to upgrade as described in S-I-82.95/543A. You may be able to switch from TeleAid to Mercedes-Benz mbrace if you already have the digital TeleAid system installed. You will also need a subscription. To start this procedure, call Mercedes-Benz at 1-866-990-9007.
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