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Old 12-01-2017, 05:12 PM   #11
Scarecrow
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Default Re: Mercedes Security Vulnerability

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Originally Posted by Old Crows View Post
Re-reading this after a good night's sleep.....

Now I've not verified this on the Sprinter as it has 'push button' key fobs .... but... I don't think you can lock the car/van with a 'hot' key inside. The system knows it is there and won't lock the doors. Our Sienna & HiCam won't lock with a key inside. (This has saved me oodles of time and miles because the XYL used to lock her keys in the care about once a year...)

Ummm... I leave my spare key in my 2018 Murphy Bed all the time, and the main set lows me to lock and unlock it whenever I wish. No problem. Both have batteries, and can be used interchangeably. I give the spare to any visitor that might be traveling along with me.
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Old 12-02-2017, 11:04 AM   #12
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Default Re: Mercedes Security Vulnerability

To my knowledge no Sprinter has any Fob proximity/location technology built in to the system. Keys hidden within the vehicle are not an issue.

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Originally Posted by Old Crows View Post
... Not sure if the fob has an RFID chip that has to be very near the the ignition switch to start it in addition to the key.
...
There is a chip. The battery in the Sprinter Fob is for the remote locks/security system. The engine start key recognition is via the chip. For starting a Fob key will be recognized whether the battery is good or not.

A T1N Fob. The NCV3 would be similar as to chip location.

Key (1).jpg

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Old 12-02-2017, 12:59 PM   #13
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Default Re: Mercedes Security Vulnerability

"Now I've not verified this on the Sprinter as it has 'push button' key fobs .... but... I don't think you can lock the car/van with a 'hot' key inside. The system knows it is there and won't lock the doors. Our Sienna & HiCam won't lock with a key inside. (This has saved me oodles of time and miles because the XYL used to lock her keys in the care about once a year...)Ē

This is fine as long as you donít leave through the coach door like we did with our keys locked inside. Fortunately or unfortunately, there are two outside bins where you can get into a Serenity without a key. I wonder why we even bother to lock it.
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Old 12-02-2017, 02:27 PM   #14
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Default Re: Mercedes Security Vulnerability

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I have a couple of hot rods with hidden battery disconnect switches. However, modern cars have a lot of accessories that need to be connected at all times. Your station settings on the radio for instance. Too, unless the disconnect was outside the coach, you couldn't engage the door locks. More trouble than it's worth.
Let me make a correction here. I was not thinking about removing the chip key battery, just disconnecting the regular battery. My bad.
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Old 12-03-2017, 03:05 PM   #15
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Default Re: Mercedes Security Vulnerability

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Originally Posted by SSTraveler View Post
Mercedes Benz vehicles are particularly vulnerable to thieves stealing the vehicle by using the key fob electronics. I just read this article today, http://www.dailymail.co.uk/news/arti...g-gadgets.html, and it got me to thinking about this key fob vunerabilty with MB Sprinter RVs. If anyone keeps a spare fob hidden on the RV for emergencies or leaves the key fob in the RV when camping and sightseeing (when gone from the RV) then the MB RV is vunerable to theft. Even going into a resturant when traveling. As long as the fob is relatively near it can be hijacked. Faraday or RFID blocking bags can protect your fob when your not using. I bought this bag, https://www.amazon.com/dp/B01H1C21O2...511799332&sr=2, because it seemed the smallest. It's sad but these days it's better to protect yourself than be sorry. It's interesting that insurance companies may not cover this type of theft because they only cover breaking and entering, which this method does not involve!
Wouldn't wrapping your spare in aluminum foil do the same thing?
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Old 12-04-2017, 12:02 PM   #16
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Default Re: Mercedes Security Vulnerability

I guess it's easy to check, wrap it and click it and see if the signal gets through. I went with small RFID blocking bags I think they will be more durable and easy to manage. I also bought RFID blocking sleeves, https://www.amazon.com/Blocking-Pass...+sleeves&psc=1, I travel a lot and didn't realize how vunerable all of the chipped stuff is to theft.
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