Samuraisaint Posted March 5 Share Posted March 5 Novice here! The car is a 2016 E350 convertible. Recently, I had an occasional "anti-collision inoperative" notice on my key fob, which I learned may be due to a low battery charge. I drove for 10 minutes and the message disappeared. While starting the automobile last Thursday, a message appeared prompting me to consult a workshop without needing to change gears. There were no warning sounds or check engine lights. I drove the car up and down the driveway without any issues, but the message persisted. Utilised husband's key but found no message. I replaced the battery in my key fob, and it worked well until this morning. I received the same message without any warning, but the vehicle didn't start. I then used my husband's key, which had no message, and the car began without any issues. I have since stopped at three locations, restarted the car each time, and everything is working perfectly now. I hope the issue is just with my key. Can I get it inspected at a location other than a Mercedes dealership? Thank you everybody for your assistance! Link to comment Share on other sites More sharing options...
Jollyno Posted March 5 Share Posted March 5 If you are in Essex, Auto Lock may be able to refurbish your key. They have locations in Wickford and Great Dunmow. Link to comment Share on other sites More sharing options...
Cleverco Posted March 5 Share Posted March 5 The issue could be resolved by replacing the batteries in the fob. Uncertain about the simplicity on a 2016 vehicle? YouTube might assist you. Link to comment Share on other sites More sharing options...
Samuraisaint Posted March 5 Author Share Posted March 5 Replaced batteries in key fob on Friday, however it stopped working this morning. Recently attempted to use my fob again, received no message, and the car is functioning well. I really dislike dealing with cars. 🤦🏻♀️🤣🤣🤣 Link to comment Share on other sites More sharing options...
Samuraisaint Posted March 5 Author Share Posted March 5 Successfully used my fob without any issues. Car started and drove normally. Planning to get the codes checked to identify any underlying issues and then assess the key. Can a major issue be identified using error codes? Apologies, this task is not often considered a "pink job," but my hubby is now unwell with a cold. Link to comment Share on other sites More sharing options...
AmericaMonster Posted March 5 Share Posted March 5 My recommendation is to charge the primary battery using a smart charger. During winter, batteries tend to discharge more quickly. Then observe the progression of events. A ten-minute trip will not have any significant long-term impact. Link to comment Share on other sites More sharing options...
Samuraisaint Posted March 5 Author Share Posted March 5 Thank you! I will ask the garage to do it instead than doing it myself, obviously. Link to comment Share on other sites More sharing options...
Samuraisaint Posted March 5 Author Share Posted March 5 It's peculiar that the issue only occurs when using my key, and it has only occurred twice since Thursday. I tested my key again earlier, and it worked well. Link to comment Share on other sites More sharing options...
Samuraisaint Posted March 5 Author Share Posted March 5 The automobile was sent to the mechanic today due to a complete battery failure. Diagnostic tests completed and passed - new battery installed, hoping for the best! Link to comment Share on other sites More sharing options...
AmericaMonster Posted March 5 Share Posted March 5 \It is likely the first battery, around 8 years old. It will be fatigued at this point. I suggest purchasing and using a smart charger, particularly in winter. Link to comment Share on other sites More sharing options...
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