You may try TM100 key programmer, it has some same functions as Tango, such as cover/read/write and generate transponders, read kilomoters,VIN,and transponder type plus new functions like PIN calculation and support totally 62 key maker modules.
The MD802 is mainly used to read codes and clear codes for European, Asian, and Domestic vehicles from year 1996. The update is necessary if you want to use it on latest car models.
The tool already has a direct discount (43% off ),apply coupon code : MS908PE655 at checkout,the price will reduce by $65.5,so the final price is $2699.
http://www.autelscanner.com/products/Autel-MaxiSys-Elite_832.html
The update goes up to 2013.. I have not try it on newer year models.I used it on honda, nissan, ford, land rover, bmw, toyota and worked.Easy self explandatory friendly use. I have the Autel DS 708 too.so it was a great addition to my scan tool.