How to Find the S/N on a C-Class's Radio
The only thing you'll need to get the code is your radio's serial number (not part number!).
On all Mercedes's, you can find it in one of these places:
- Displayed on the radio screen (sometimes)
- On the radio body itself - you'll need to pull it out and write down your serial (which is not so hard).
Search for something that looks like: Serial, SN, S/N, Serial Num...
1. Find the S/N on Mercedes C-Class's Display
Unfortunately, on Mercedes C-Class radios the serial number is not shown on the screen.
In that case, you'll need to take out the head unit and check the sticker on the side of the radio.
2. Locating your Serial on the Radio Unit
To find the serial number, you'll need to remove the head unit from the dashboard.
- Start by turning off the ignition and taking off the dashboard bezel.
- Next, unscrew the mounting bolts and slide the radio out to check the label on the side of the radio. Be careful not to damage the cables that the unit is connected to.
- Write down full serial number precisely and come back to our website.
- Know that serial number and part number are not equal. You will find both on the unit, but you only care for the first one.
Example: Mercedes C-Class serial number label location
Most Common Mercedes C-Class Radio Serial Number Formats
Your Mercedes C-Class radio serial number may start with:
BEAL
Common Mercedes C-Class Radio Code Issues
Your radio may lock automatically when it loses power.
These are the some typical scenarios that trigger the radio code prompt.
Battery Change (Most Common)
When the battery is removed, the Mercedes C-Class radio locks automatically.
This factory protection system is designed to prevent theft by disabling the radio after power loss.
Other Situations That Trigger a Radio Code on Mercedes C-Class
- Installing a replacement head unit will require the original anti-theft code.
- After an ECU or software reset, the radio may lock.
- A blown fuse can cause the Mercedes C-Class radio to request a security code.
- Jump-starting the vehicle can reset the radio, requiring the unlock code.
Can I get a Free Mercedes C-Class Radio Code?
Looking for a free Mercedes C-Class Radio Code? Actually, you may already have it.
In few cases, your code may already be available in the vehicle or in the documentation.
Check these places to save time and money before using an online generator.
Below are the most reliable places to look.
Check the Car and Its Documentation
- In the radio manual, often on a code card.
- Inside the glovebox, sometimes on a small card.
- In the trunk, on a service sticker.
- In your service book from the previous owner.
- On the radio unit itself, if it was serviced earlier.
Getting a Mercedes C-Class Radio Code from the Dealer
A Mercedes dealer can usually look up the security code using your C-Class's vehicle identification number.
In most cases, you need to contact the service department or visit the dealership and prove ownership.
When it is verified, they can request the original unlock code for your radio.
Disadvantages:
- You usually need to visit in person and bring ID.
- Dealers often charge a fee for the lookup service and it can cost more than 100$.
- The process can take hours depending on the model and database.
- Some older Mercedes C-Class radios may require manual lookup.
Why Use Our Mercedes C-Class Radio Code Lookup Service?
Our Mercedes C-Class radio code lookup is designed to avoid dealer visits.
Unlike traditional dealer lookup, this method doesn't require VIN and can be done online in minutes.
It's a faster and cheaper alternative for drivers who need their radio unlocked quickly.
The Dealer's VIN Lookup vs FindRadioCode
- Dealer services often charge high fees, while FindRadioCode offers codes from 9.99$.
- Some dealers require visiting the service center and showing documents, while FindRadioCode is fully online.
- Dealer lookup can take days, while our system delivers codes instantly 95% of times.
- Dealerships operate during business hours, while FindRadioCode is available anytime.
- Dealer lookups often come with limited refunds, while FindRadioCode offers a 100% refund.
You've Got the Code. How to Enter It?
Once you have the Mercedes's unlock code, you can type it in using the radio buttons.
Most radios display "ENTER CODE", "----" or "XXXX" message when they are locked.
You typically use the rotary knob to input the code.
After entering the full code, the radio will restore normal operation.
If you make a mistake multiple times, you may cause the C-Class's head unit to block further attempts.
When this happens, the screen can display messages like "CODE ERR", "ERROR", or a blank screen.
To unlock the system, you usually need to leave the radio powered for a waiting period or up to a full hour before trying again.
C-Class's Radio Code FAQs
Many of their radios use a anti-theft code, but not every model year or radio type requires one.
It depends on the factory stereo and production year.
Free security codes are rarely available.
Some dealers may help, but most codes require serial number lookup.
The only free way would be to search your car and its glovebox to see if you already possess the code.
Yes, each radio unit has its own security code. If you install a replacement radio, you'll need the code for that specific unit.