I have a 2013 Glk350 that will no longer start. I was not with the vehicle when the problem arose but here are the circumstances surrounding the situation:

Last evening the key fob started acting up and would not unlock/lock the car. The car started and ran fine, however. This morning, the car ran and drove as normal as well but again, the key wouldn't unlock the doors. When the car started this afternoon it refused to go into reverse. She turned the car off and attempted to restart it but it wouldn't start. When the key is turned to any position, nothing happens. The dash does light up when the doors are opened and the interior lights work. The battery in the key fob is brand new and the fob lights up when any button is depressed.

Does anyone have any ideas where to start? Thanks in advance!

 

How old is the battery, what’s the battery voltage, try charging it, you need a charger with an AGM cycle. Any auto store should test it for free.

 

Is steering wheel unlocked? If you put the key in, do you hear the specific sound for unlocking the steering wheel?

 

The wheel is unlocked regardless of key being inserted. I haven't driven the car for a month (girlfriend is borrowing it) so I can't remember whether or not it normally locks.

 

Battery is brand new and meters out at 12.5v. I have checked for power to all of the terminals inside the fuse block next to the battery as well. Additionally, I ordered a icarsoft MB 2 which will be here tomorrow. I'm assuming it sounds like the ESL has malfunctioned, since the steering wheel is unlocked all the time now.

 

can be esl can be keys....

if you're close to me I can check

 

Where are you located? I'm in Southern Maine.

Thanks!

 

NYC!!

 

12.5 is real low for a new battery , new should be over 13, my 6 year old battery is 12.4, charge it and see. But if it stays 12.5 something is wrong .

 

actually 12.5 is correct and more than enough to start any car, the battery management in an md threshold is 11.3 volts before it starts dropping off unnecessary components like radio and interior lights, the eis and earl can operate at 10.5 volts. A batter will never be over 13 volts unless it just came off a charger and that combs last like 5 mins, a 12v battery is a 12v battery and will not be 13 volts, the OP is having different problem for the battery. An other please don’t try to say different, wrong information waste a lot of people time, his battery is fine, he said he’s not getting any ignition, accessories or able to operate keyless entry, 12.5 volts is more than enough to do that... yes I’m an electrical diagnostics engineer since 2001 and I happen to also I’ve a S550 some times I’m don’t drive it for months and the battery drops to 10.5 and my car starts right up on the first try, and yes I know the S550 has an independent starter battery but my point is the locks, and ignition still fires up fine

 

12.5 is no more than 80% charged, I recently got a new battery and for a month it stayed at 13,

 

have you checked the battery before starting the car or you’re checking it while the engine is running?

Regardless the OP should have some type of response at voltage as low as 11v

 

Well, through the power of YouTube and deductive reasoning I've figured out its the actual key that's the issue. Borrowed a spare from a friend and the dash lit up. Any suggestions as to where to find a key besides the dealer?

 

As I said from the jump
did it say “incorrect key or key doesn’t belong to the vehicle”

I can make you a key but you have to send me your EIS, when I send it back everything is plug and play

 

Thanks for the offer but I found a local locksmith who does Mercedes keys. $350 (including the key) if I bring him the eis which I will do in the am.