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I have a 2011 Mercedes e350 Cabriolet. When i turn the key, nothing happens. Called AAA and when the driver got to my location he tested my battery and said i needed a new battery. After $178 for the new battery that still did not fix the issue. The car wont start but the battery is new. I went to the store to purchase groceries and when i got to the car to turn it on, it wouldn't start. No Check Engine light. All it shows on the dash is "Take your key from Ignition." The key will turn all the way but will not do anything. Won't try to crank or show the data on the dash that it is trying to start. It just shows "Take your key from Ignition."
I tried my second spare remote key - nothing
New Battery - nothing
Checked the fuses and they are good
Replaced brake light switch - nothing
Checked starter relay and its good.
Thank you for your comment. I looked in the trunk all i see is a fuse box and the Sirius Satellite Radio but no Auxiliary battery. I have looked on the driver side panel and still no luck.
Hi I just started having the same problem as you are and just like you I've tried finding the Auxiliary battery and it's not in the trunk and not where they said in the dash either have you had any luck finding it .
When I had the issue, it turned out to be the Electronic Steering Lock and once that was replace it worked fine. I got noting when pressing the engine start button and the key just told me to remove it. Not sure that helps but that's what my issue was.
I'm not sure that the secondary battery is the issue. However, I did see a video on youtube that showed how to replace it on a 2012 E350. Google "Mercedes E350 replace auxiliary battery". or see if this link works:
05-24-2020, 12:31 AM
