How to Locate the S/N on a Sprinter
The only thing you'll need to get the code is your radio's radio serial. VIN or other details are not required.
On almost all Mercedes vehicles, you can find it in these common spots:
- Shown on the radio screen (occasionally by using a key combination)
- On the radio unit itself - you'll need to extract it and write down serial (which is usually simple)
Search for text similar to: Serial Number or SN.
1. Find the S/N on Mercedes Sprinter's Display
None of the radio systems support on-screen serial retrieval. The unit must be extracted from the dashboard to read the label.
2. Locating your S/N on the Radio Body
The serial number is usually found on a label attached to the radio casing.
Step 1: Turn off the car.
Step 2: After that, remove the dashboard trim.
Step 3: Then unscrew the radio brackets.
Step 4: Carefully pull the radio forward partially (Be careful not to damage the cables that the unit is connected to).
Step 5: Look for the serial on the side of the unit.
Step 6: Write down the full Serial Number carefully and come back here so that we can generate the code.
Important: Be careful not to mix the Serial Number and the Part Number!
How to Extract Your Mercedes Radio
To remove a Mercedes radio, you need Mercedes-specific radio release keys that insert into the holes on each side of the unit. Push until the clips release, then slide the radio out. The serial label is on the chassis.
Example: Mercedes Sprinter serial number label location
Usual Serial Prefixes on Mercedes Sprinter Radios
Your Mercedes Sprinter radio serial depends on the manufacturer: Alpine units start with AL (e.g. AL2910), Becker with BE (e.g. BE7822), Blaupunkt with BP, and Bosch with CM. The serial is on a label on the radio housing. Do not use the part number (starting with A163820...).
When Your Mercedes Sprinter Radio May Ask for a Code
Facing a locked Mercedes Sprinter radio? Usually, it was caused by one of these common events.
Battery Change Lock (Most Common)
When the battery is removed, the Mercedes Sprinter radio requests a security code.
This security feature is designed to prevent theft by disabling the radio after electrical reset.
More Events That Can Lock Your Sprinter's Radio
- After an ECU or software reset, the radio may lock.
- Installing a used head unit will require the original radio code.
- A blown fuse can cause the Mercedes Sprinter radio to lock.
- Jump-starting the vehicle can reset the radio, requiring the PIN.
Before Paying for Help
Before you pay for it, it's worth checking a few places where the code is often stored.
Some owners find their Mercedes Sprinter radio code without needing any tools or paperwork.
Here are the easiest things to check first.
Look Inside the Car Papers
- On the head unit itself, if it was removed before.
- In the boot compartment, on a radio label.
- In the owner's manual, often on a code card.
- Inside the glovebox, sometimes on a small card.
- In your car paperwork from the previous owner.
Dealer Retrieval Process
Dealerships can retrieve your radio code by checking the vehicle records in their system.
They typically ask for registration and ID before sharing the security PIN.
This is the official way to restore access to the factory radio.
Downsides:
- You may need to contact service support during business hours.
- The lookup is often slower and may require waiting.
- Some imported or older radios may need extra verification.
- Dealers frequently charge a service fee (sometimes more than 100$).
You Found the Code. How to Enter It?
With your code ready, it's time to input it into the Mercedes Sprinter's radio.
The locked radio will usually show a "CODE" prompt.
Use the built-in buttons or touch controls to dial in each digit, then press OK to activate the stereo.
Try not to make mistakes, because too many wrong attempts can disable your radio temporarily.
It allows a few incorrect tries before showing a LOCKED message.
You can reset the lockout by keeping the ignition on for an hour or a set waiting period.
Frequently Asked Questions about Mercedes Sprinter Radio Code
Yes. Each head unit has its own security code.
If you install a different radio, you'll need the code for that individual radio.
Free radio codes are rarely available.
Some online tools may help, but most codes require a dealer lookup.
The only free possibility would be to search your car and its glovebox to see if you have it written down.
Many original head units use a security code, but some versions require one.
Whether a code is needed varies by the installed head unit and the model year.