DETAILS, FICTION AND MERCEDES KEYS

Unlocking and locking motor vehicle operates. All other electrics don't get the job done. Batterie is ok, fuses are Alright. Do you're thinking that it could be the ESL or the EIS. If the small motor during the ESL device is broken And that i set in a fresh motor do one ought to reprogram ? I saw your online video and know how to choose out the ESL