How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Kevin Your Own Question
Kevin, Master tech
Category: Mercedes
Satisfied Customers: 1821
Experience:  Diagnostic technician
Type Your Mercedes Question Here...
Kevin is online now
A new question is answered every 9 seconds

I have a 2012 ML 350 the keys wont lock the car or open the

Customer Question

I have a 2012 ML 350 the keys wont lock the car or open the hatch. I tried changing the batteries and it still will not work
JA: Have you changed a battery before?
Customer: no its both keys
JA: What is the model of your '12 Mercedes?
Customer: ml 350
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: yes, so far i only changed the battery
JA: Anything else you want the mechanic to know before I connect you?
Customer: yes I hand some mechanic work about a month ago, tires, oil change route stuff, could they have turned something off?
Submitted: 7 months ago.
Category: Mercedes
Expert:  Kevin replied 7 months ago.

Hi im kevin can you lock doors from button on drivers door ? Do you have a spare key ?

Customer: replied 7 months ago.
Hi Kevin, Yes the locks work manually. However the key wont lock or unlock the car nor will it open the hatch. It is both keys
Customer: replied 7 months ago.
Expert:  Kevin replied 7 months ago.

Ok its likely the antenna for the key pickup has fauled if both keys arent working .the only way to confirm this is with a mercedes scan tool

Customer: replied 7 months ago.
OK do I have to go to a dealer for this?
Expert:  Kevin replied 7 months ago.

Most likely or a mercedes specialist as they will be the only people that can repair this is antenna is the cause