Locked out of your Mercedes stereo after a battery change? Here's exactly what to do.
If your Mercedes radio is showing a code prompt and won't play, it has activated its anti-theft lock — usually after a dead or disconnected battery. You'll need your factory unlock code to get it working again. Here's how.
Mercedes-Benz factory radios lock after a battery disconnect. The unlock code is matched to the radio's serial number.
Send us your Mercedes radio serial number (or VIN where applicable) and we'll look up the correct factory code and email it to you. Standard delivery is 30 minutes to 24 hours, 7 days a week; Express is guaranteed within one hour during business hours.
Enter the code using the number keys, then confirm.
We've supplied factory car stereo unlock codes since 1998, with a money-back guarantee if we can't retrieve a working code. Thousands of Mercedes owners have used us to get their radios playing again.
Need help entering it? See the Mercedes input manual.