A: Mercedes stopped releasing new NTG 4.7 firmware around 2019. The "updated" versions circulating today are the final stable builds. Have you performed the NTG 4.7 firmware update? Share your experience in the comments below. For more Mercedes-Benz tech guides, subscribe to our newsletter.

| Feature | Before (Old Firmware) | After (Updated Firmware v11.x) | |--------|----------------------|--------------------------------| | Boot time | 45+ seconds | 18–22 seconds | | Bluetooth audio | Frequent stutter | Clean, uninterrupted playback | | Phone call quality | "Underwater" sound on some iPhones | Crystal clear HD voice | | Navigation route calc | 10-15 seconds | 3-4 seconds | | SIRIUS presets | Randomly lost on restart | Persist indefinitely | | Rearview camera | 2-3 second delay | Instant (<0.5 sec) | | USB media scanning | Scanned entire drive every start | Caches, resumes instantly |

For owners of premium Mercedes-Benz vehicles produced between 2011 and 2015, the acronym NTG 4.7 (New Telematics Generation 4.7) is central to the infotainment experience. This system powers navigation, audio, Bluetooth connectivity, and vehicle settings in models such as the C-Class (W204), E-Class (W212 facelift), M-Class (W166), GL-Class (X166), and SLK-Class (R172).

A successful update will make you wonder how you ever tolerated the old software. Frequently Asked Questions (FAQ) Q: Is the NTG 4.7 firmware update free? A: If you download it from unofficial sources, yes, but with risk. Dealers typically charge for the service. Some map update packages include firmware updates for free.

If your car has never received this update, you are essentially driving with a computer from 2012—prone to crashes and security flaws. By investing 30 minutes and the correct files, you preserve your vehicle’s functionality, safety, and enjoyment.

A: Unofficially, yes, but it is complex and risky. Official Mercedes updates are one-way only.

A: No. NTG 4.7 hardware does not support native CarPlay. However, some aftermarket modules (e.g., JoyeAuto, Unique Auto Developments) can add CarPlay after the firmware update.