Have EIS/ELV cable tester for your vvdi mb bga tool? Think it expensive? You can make EIS/ELV NEC adapter by yourself and save a lot.

 

For Mercedes W204 W212 W221 W164 W166, it’s necessary to have this adapter to use with the EIS ELV maintenance, Mercedes key programming and key detection.

 

Here are some diagrams for reference.
W164 / R251 / W221 / W216 with NEC inside

build-vvdi-eis-elv-adapter-1

w203 / vito w639 with mcu HC908 inside

build-vvdi-eis-elv-adapter-2
w203 with mcu hc912 inside
build-vvdi-eis-elv-adapter-3
W204 / W207 / W212 with NEC inside
build-vvdi-eis-elv-adapter-4
W210 / W208 / W202 with HC705 iside
build-vvdi-eis-elv-adapter-5
W211 / W219 / W209 with HC912 inside
build-vvdi-eis-elv-adapter-6
W220 / W215 / R230 with HC705 inside

http://blog.vvdishop.com/build-eis-elv-nec-adapter-for-vvdi-mb-tool/