Finding the Serial N. on a SLK's Radio
The only thing you'll need to find the corresponding code is your radio's serial num. (not part number!).
On all Mercedes's, you can find it in one of these places:
- Directly on the radio screen (sometimes)
- On the radio unit 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 Num., SN, S/N, Serial, Serial Number...
1. View the Serial Number on Mercedes SLK's Display
Mercedes SLK radio does not display the serial number on the screen.
Unfortunately, the unit must then be extracted from the dashboard to find the serial on a factory sticker on the radio casing.
2. Find the S/N on the Radio Sticker
The serial number is usually located 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 release the mounting clips.
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 number on the side of the unit.
Step 6: Write down the full number carefully and come back here so that we can generate your code.
Important: Don't mix the Serial Number from the Part Number!
Example: Mercedes SLK serial number label location
Common Serial Number Prefixes on Mercedes SLK Radios
Your Mercedes SLK radio serial number may start with:
BEAL
Common Mercedes SLK Radio Code Issues
Many owners encounter radio code issues on their SLK after battery-related issues.
Below are the most common situations when this can occur.
Battery Change (Most Common)
After a battery change, your radio may show a CODE message.
This happens because the radio recognizes a voltage interruption, which triggers the security lock.
Other Situations That Trigger a Radio Code on Mercedes SLK
- Installing a replacement head unit will trigger the original radio code.
- After an ECU or software reset, the radio may lock.
- A fuse removal can cause the Mercedes SLK radio to request a security code.
- Jump-starting the vehicle can reset the radio, requiring the unlock code.
Quick Fixes Before Buying a Radio Code
Want free Mercedes SLK 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 simplest places to look.
Check the Car and Its Documentation
- In the owner's manual, often on a sticker page.
- Inside the center console, sometimes on a label.
- In the trunk, on a radio label.
- In your service book from the previous owner.
- On the head unit itself, if it was serviced earlier.
Can the Dealer Get You the Code?
Dealerships can retrieve your radio code by checking the VIN in their system.
They typically ask for registration and ID before sharing the unlock code.
This is the official way to restore access to the factory radio.
Downsides:
- Some imported or older radios may need extra verification.
- You may need to contact service support during business hours.
- The lookup is often not instant and may require waiting.
- Dealers frequently charge a service fee (sometimes more than 100$).
Why Use Our Mercedes SLK Radio Code Lookup Service?
Our Mercedes SLK 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 vs FindRadioCode
- Delivery time: May take hours, while FindRadioCode is instant 95% of the time.
- Availability: Dealers work Mon - Fri, while our service is always available.
- In-person visit: Lookup can require an appointment, while FindRadioCode works remotely.
- Pricing: It often costs 100 - 200 USD, while our service starts from 9.99 USD.
- Refund policy: Dealers usually offer limited refunds, while we include a full refund policy.
You've Got the Code. How to Enter It?
Once you have the Mercedes's radio code, you can enter it using the radio buttons.
Most radios display a "CODE", "ENTER CODE", or "----" message when they are locked.
You typically use the preset buttons to select each digit.
After entering the full code, the radio will confirm the entry.
Be careful, because too many wrong attempts can temporarily lock the radio.
It allows a few incorrect tries before showing a LOCKED message.
You can try again by keeping the ignition on for one hour or a set waiting period.
SLK's Radio Code FAQs
Many of their radios use a security 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 online tools may help, but most codes require serial number lookup.
The only free possibility would be to check your car and its documentation to see if you already possess the code.
Yes, each head unit has its own security code. If you install a used radio, you'll need the code for that specific unit.