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Discussion Starter · #1 ·
Sliding door on my EQV suddenly stopped working and the car couldn't lock. Mercedes kindly assisted and the RAC guy arrived and, eventually, we figured out that it was a fuse.
You would think that this should be a straight forward fix but he realised that next to the 30 (amps) print there was a letter E. What on earth was the E??? So apparently is only for electric vehicles so initially he was very hesitant to replace it with a normal fuse. Apparently the E fuse are transformer protected?
Since this is a part of a 12V circuit I am not sure as to why you need a "special" fuse but there you go. He called the technical team who said it was OK to replace it with a normal 30amp fuse.
Anyone has any idea if there is any reason for these "E" fuses and should we buy a few E as there is no way that any recovery vehicle would have them just in case a Merc breaks down? (or maybe they do I don't know).
Thanks
 

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Hi. If nobody answers here, I would ask Mercedes in the Mercedes Me app. And if you get talking to them , maybe mention they should consider to use 1 of their 173,000 employees to answer some more questions here and in the other forums as it might also reduce Mercedes Me support questions needing answer. Maybe one of the people in the shrinking petrol engine departments could start educating themselves as well as us. Be interesting how they respond
 

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I believe E fuses are used to protect transformers etc.as they are designed to take an overload of current for a long period of time than a standard ‘quick blow’ fuse, so could be used in a motorised door to allow a sustained load which would blow a normal fuse immediately without installing a higher rated fuse which may not protect the system when it needs to.
 

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Discussion Starter · #4 ·
That's very helpful, many thanks. All the fuses on the Merc are E rated. I am really perplexed as to why the fuse blew as there was nothing done to the door. One moment was working and then nothing. I need to take the car back to replace a faulty charging cable and a squeaky steering wheel (don't start me) so hopefully the garage could provide an explanation. Apparently the RAC diagnostic tool connected to the OBD could not give all the codes, you need a Merc one.
 

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Discussion Starter · #5 ·
Hi. If nobody answers here, I would ask Mercedes in the Mercedes Me app. And if you get talking to them , maybe mention they should consider to use 1 of their 173,000 employees to answer some more questions here and in the other forums as it might also reduce Mercedes Me support questions needing answer. Maybe one of the people in the shrinking petrol engine departments could start educating themselves as well as us. Be interesting how they respond
Its like the early versions of Microsoft Windows! Microsoft sold you a product that kind of worked and then asked you to pay for the updates to fix it! My understanding is that the dealership does not want to sell your electric cars. Its just a computer on wheels so only firmware update and tyres (and unfortunately all the electrics that go wrong !). I do not think that they know more than the customer (apart from the trained staff). Its a good think that we can share knowledge and support each other.
 
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