Xtool M821 Adapter: Designed for Mercedes Benz All Key Lost

Xtool M821 Adapter is newly coming soon. Designed to program Mercedes Benz all key lost. Should work with XTOOL X100 PAD3 or X100 Max &KC501 Key Programmer together. To improve 65% efficiency, no need to plug or unplug hundreds of times.

Note: Please first update your Mercedes Benz key programming software to the latest version 27.10.


Xtool M821 Mercedes-Benz Car List Supported:

Year ELS NO. Chassis NO. Models
2006-2011 W164 W164 GL-Class
2009+ W251 R-Class
2011-2015 W166 W166 GL-Class
2007-2009 W204 W204 C-Class
2009 GLK-Class
2003-2009 W211 W211 E-Class
2004-2010 W171 SLK-Class
2006-2010 W219 CLS-Class
2010-2014 W212(NEW) W212 E-Class
2013-2015 W204 GLK-Class
2012 W251 R-Class
2012-2014 W172 SLK-Class
2018-2022 W216 W221 S-Class
W221 W221 S-Class

What is in the Xtool M821 package?
M821 Mercedes Benz AKL adapter
J1K02_BENZ_Wiring Harness
Quick Guide

How to connect M821 Communication Adapter?
1. Connect Xtool device & KC501 via USB;
2. Connect Mercedes Benz IR emulator with KC501;
3. Disconnect OBD2 connector from main cable, connect Xtool device(or VCI box) with M821 Adapter by main cable;
4. Use 12V power supply to main cable;
5. Connect EIS/EZS module with M821 Adapter by J1K02_BENZ_cable.
*Please check wiring diagram in Xtool device when connecting M821 Adapter & EIS/EZS module via J1K02_BENZ_cable.
*The Mercedes Benz IR emulator should insert into the slot of the module when operating.
*For device with a VCI box, connect 821 Adapter with VCI box by main cable, keep VCI box connected with the device via Bluetooth. More details can check in device when connection.

More questions welcome to contact us.


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