When you will need use this ELV Adaptor?
Unlock W204 ESL: Fix the locked ESL to normal one (NEC chip fatal error: 0xAA). This function need buy an extra NEC ELV adaptor, support W204 ESL and old Motorola ESL. You need select Adaptor option in ESL window
When the W202/W204/W207 ESL damaged, you will need to use the NEC ELV adapter to works together with VVDI MB BGA tool to renew, then use MB BGA tool to reprogram key.