Mercedes Bluetooth Adapter

Last updated: October 27, 2026

In this guide (6 sections)

1. How to check if you have a UHI System
2. Mercedes Bluetooth adapter for sale
3. Mercedes Bluetooth Functions
4. How to add Bluetooth hands-free to your Mercedes
5. Bluetooth dongle interface compatibility
6. A Faster Way to Settle the Compatibility Question

Are you looking to add Bluetooth functionality to your Mercedes-Benz to make hands-free calls? We will look at a few options for adding Bluetooth hands-free phone adapters to older MB cars. Several Bluetooth module adapters are available even for older Mercedes-Benz cars, dating back to 2003.

How to check if you have a UHI System

Step 1

Check if you have the TEL button in your Comand / Radio / Stereo. When you press the TEL button, you will normally get a “Tel not activated” or “Telephone is not installed” error message. This is ok.

Step 2

Look for the UHI connector and cradle install port inside the armrest compartment. It may be covered with a plastic cover, but it should look like this.

Step 3

We recommend that you call your Mercedes dealer and verify compatibility. The vehicle should be equipped with a UHI connector system. Some systems may require an update to download the phonebook into the head unit.

Mercedes Bluetooth adapter for sale

Factory Mercedes Bluetooth cradle adapter

• OEM Mercedes Bluetooth interface module adapter
  This is the factory Mercedes Bluetooth module. It is sold at Mercedes-Benz dealerships and can be purchased online as well. There isn’t any programming necessary other than pairing it with your phone. Instructions on pairing the OEM Mercedes Bluetooth adapter can be found here. You will be able to make and receive calls. Pair up to four phones and access your phonebook using the buttons on your Comand.
  • Check Price on OEM Mercedes Bluetooth Adapter

Aftermarket Mercedes Bluetooth alternative

• Viseeo Mercedes Bluetooth Adapter
  An aftermarket upgrade that allows you to add Bluetooth functionality to your Mercedes-Benz. You can use either Viseeo MB-3 or the MB-4 with the existing factory system. Steering wheel controls can be used to answer and end calls. MB-4 fully integrates with Mercedes-Benz vehicles equipped with telephone equipment and plug-and-play connections. Up to four phone pairings. Phonebook synchronization. SIRI activation from the Mercedes keypad for iPhones.
  • Check the Price on Viseeo Mercedes Bluetooth Adapters (eBay link)

Mercedes Bluetooth Functions

• Instrument Panel Display: Your phone book automatically downloads into your MB head unit. Assuming you have a Mercedes-Benz-approved phone. You can view your phonebook entries and Caller ID directly on your instrument cluster.
• Steering Wheel Controls: You can scroll through your phone book and adjust the call volume. You can also make calls, end calls, or answer calls.
• Audio System Display: You can access information directly from your phone, including phonebook entries, dialed numbers, phone status, Caller ID, and text messages.
• Auto Mute: The audio system automatically mutes the radio or pauses the CD player during calls.

How to add Bluetooth hands-free to your Mercedes

1. Turn off the ignition.
2. Locate the UHI connection in the center console
3. Remove the cap from the UHI port
4. If your Bluetooth kit has an adapter, install it by sliding it into the UHI port.
5. Install your Mercedes Bluetooth Adapter.
6. Pair your Mercedes Bluetooth Adapter with your smartphone. Press the Mercedes star button on the Bluetooth adapter and hold it for three seconds. The Bluetooth cradle will be in discovery mode.
7. If you have an Android phone, go to Settings> Bluetooth > Search for Bluetooth devices.
8. Select the Bluetooth device. Viseeo MB-3 or MB Phone System, for example. Next, enter a pairing code. The pairing code is typically 1234 or 0000.

Mercedes Bluetooth adapter instructions can also be found here in the owner’s manual.

Bluetooth dongle interface compatibility

Some Mercedes-Benz cars may require an update to function with newer phone models. If your phone is not pairing or the address book isn’t downloading, check with a dealership to see if an update is available.

Your Mercedes-Benz needs to be equipped with an integrated hands-free communication system. Your MB should also have a Bluetooth dongle receiver (MHI interface). This module has part numbers B67876131or B6788001. These two modules look different but have the same functionality.

C180, C200, C230, C240, C250, C280, C300, C320, C350, C55 AMG, CL500, CL55 AMG, CL600, CL63 AMG, CL65 AMG, CLK280, CLK320, CLK350, CLK500, CLK55 AMG, CLK550, CLK63 AMG, CLS350, CLS500, CLS55 AMG, CLS550, CLS63 AMG, E250, E280, E300, E320, E350, E500, E55 AMG, E550, E63 AMG, G500, G55 AMG, G550, GL320, GL350, GL450, GL500, GL550, GLK280, GLK300, GLK350, ML320, ML350, ML500, ML550, ML63 AMG,R320, R350, R500, R550, R63 AMG, S400, S430, S450, S500, S55 AMG, S550, S600, S63 AMG, S65 AMG, SL500, SL55 AMG, SL550, SL600, SL63 AMG, SL65 AMG, SLK200, SLK280, SLK300, SLK350, SLK55 AMG, SLR McLaren, SLS AMG

A Faster Way to Settle the Compatibility Question

Step 3 of the check above ends by telling you to ring your Mercedes dealer and confirm the car is equipped for this. That is sound advice and it is also a phone call, a parts department and a wait. The car can answer the same question in your driveway, because a telephone module either exists on the network or it does not.

A full system scanner such as the YOUCANIC UCAN-II Pro lists the control units the car actually has, which is a more direct answer than a TEL button that says “telephone is not installed” whether the hardware is missing or merely not activated. A basic OBD2 reader cannot do this, since it only talks to the engine.