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Kevin
Kevin, Master tech
Category: Mercedes
Satisfied Customers: 1684
Experience:  Diagnostic technician
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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: 5 months ago.
Category: Mercedes
Expert:  Kevin replied 5 months ago.

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

Customer: replied 5 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 5 months ago.
Hello?
Expert:  Kevin replied 5 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 5 months ago.
OK do I have to go to a dealer for this?
Expert:  Kevin replied 5 months ago.

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