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Garage emf interference

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Garage emf interference

 
Old 02-11-2019, 04:35 PM
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Garage emf interference

Hi Mb experts

I am having the following problem:
1. Car consistently starts in driveway
2. Car consistently starts in garage when parked on outside wall.
3. Car will not fire in garage when parked n inside wall.
4. Car does turnover but it doesn't fire up when parked in the garage bay closes to house.
5. If I push car outside of garage. Car starts immediately.

As weird as this sounds it is exactly what is happening and I can reproduce this.
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Old 02-11-2019, 05:24 PM
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Call the exorcist.
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Old 02-11-2019, 06:05 PM
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Originally Posted by Pete Fuller View Post
Hi Mb experts

I am having the following problem:
1. Car consistently starts in driveway
2. Car consistently starts in garage when parked on outside wall.
3. Car will not fire in garage when parked n inside wall.
4. Car does turnover but it doesn't fire up when parked in the garage bay closes to house.
5. If I push car outside of garage. Car starts immediately.

As weird as this sounds it is exactly what is happening and I can reproduce this.
Are you talking about only if you're using the KEYLESS GO button?

If you use the key in the ignition in one of the locations (you can yank the keyless go button out to do this), does it work fine, or no start?
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Old 02-11-2019, 10:34 PM
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Originally Posted by Rogue Leader View Post
Are you talking about only if you're using the KEYLESS GO button?

If you use the key in the ignition in one of the locations (you can yank the keyless go button out to do this), does it work fine, or no start?
Car is 2011. Car just has Fab start. I really think it has to do with emf.
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Old 02-11-2019, 11:10 PM
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Wait, so this is happening when the key is in the ignition? Not in your pocket (keyless go)?

Do you have a second car that you can park in the possessed spot and see what happens?
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Old 02-11-2019, 11:40 PM
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Originally Posted by thefisch View Post
Wait, so this is happening when the key is in the ignition? Not in your pocket (keyless go)?

Do you have a second car that you can park in the possessed spot and see what happens?
Yes when key in ignition. MB won't start

Also we put a Lexus SC 430 there, battery was dead in two days. We keep the sc430 in the spot near outideo walk and it is fine.

​​​​​​
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Old 02-11-2019, 11:50 PM
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Haven't experienced anything like this myself but I get why you are suspecting interference. Not sure where your breaker panel is but mine is in the garage. If yours is conveniently located, I would turn off one breaker at a time and try to start the car while in the possessed spot. If it doesn't start, turn that breaker back on and try the next. Hopefully you will eventually cut power to the offending device, the car will start and then go check the appliances, lights, etc. on that breaker for your culprit. If the breaker panel is not close by, then get a helper and figure out a way to communicate.
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Old 02-12-2019, 07:55 AM
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Originally Posted by thefisch View Post
Haven't experienced anything like this myself but I get why you are suspecting interference. Not sure where your breaker panel is but mine is in the garage. If yours is conveniently located, I would turn off one breaker at a time and try to start the car while in the possessed spot. If it doesn't start, turn that breaker back on and try the next. Hopefully you will eventually cut power to the offending device, the car will start and then go check the appliances, lights, etc. on that breaker for your culprit. If the breaker panel is not close by, then get a helper and figure out a way to communicate.
Great idea! I will report back when I have more answers.
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Old 02-12-2019, 08:02 AM
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One thing to keep in mind is if any appliances have a battery backup (APC). To eliminate those you'd need to turn that off too or unplug them otherwise the breaker being off does nothing. You could start with the appliances/devices that are nearest like garage door openers, furnaces, etc. and those that emit RF like routers, wireless extenders or phones, etc. And also focus on anything recently installed if this problem didn't happen a week or month ago.

Last edited by thefisch; 02-12-2019 at 08:31 AM.
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Old 02-12-2019, 08:27 AM
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Maybe change the default frequency for the garage door opener?

Move Alexa to the other side of the living room furthest from the garage?

So...I guess we shouldn't park in lots under electrical transmission lines.

Last edited by DFWdude; 02-12-2019 at 08:31 AM.
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Old 02-12-2019, 09:55 AM
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Check to see if wifi in house is nearby car and car trying to connect all the time.
Or maybe inside you leave your phone with bluetooth

DO you lock car in garage and then unlock before getting in to start?
Maybe some type alarm on car does not like key.?

What type of overhead lights in garage have them off.
try garage door open and closed

Any house alarm junk nearby?
DO you have solar panel and inverter nearby?

Find a radio shack (Good Luck) and they have RF receivers to identify what is in the air so you can see if you have any interference.
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Old 02-12-2019, 10:31 AM
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Originally Posted by thefisch View Post
Haven't experienced anything like this myself but I get why you are suspecting interference. Not sure where your breaker panel is but mine is in the garage. If yours is conveniently located, I would turn off one breaker at a time and try to start the car while in the possessed spot. If it doesn't start, turn that breaker back on and try the next. Hopefully you will eventually cut power to the offending device, the car will start and then go check the appliances, lights, etc. on that breaker for your culprit. If the breaker panel is not close by, then get a helper and figure out a way to communicate.
This is a good idea, a lot of times it will be something like a Microwave or electric convection oven that will cause such a problem. Refrigerator is possible but less likely as well.
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Old 02-12-2019, 10:40 AM
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Old 02-12-2019, 01:21 PM
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This is interesting.....
I was just talking to my mechanic few hours ago on a possible radio frequency interference issue I experienced twice, which was like this :
My car was moving slow, transmission was in D and engine is running (obviously)... and then I heard a mechanical clicking sound for only like 4 seconds.
When it first happen, I could not ID the sound. That was months ago.
2 weeks ago it happened again and my driver was driving it and I was a front passenger, the clicking sound appeared again and my driver identified it as the power door lock mechanism,
but I can't confirm 100% certainty it was the power door lock.... but it does sound mechanically like a power dock lock mechanism trying to engage/lock.
So today ( after I done oil change and flushed brake fluid ), my mechanic told me that what I described, it was most likely a radio interference.
He further explained, many new cars using FOBs will not start if under a cell tower under certain circumstances/ conditions.

Then I came across this post today trying to see if my issue is common and I also googled and found this :
https://forums.tesla.com/forum/forum...l-interference
http://jamaica-gleaner.com/article/a...rt-key-systems
https://www.wardsauto.com/technology...ey-fob-mystery
https://gizmodo.com/mystery-of-block...lve-1832277387

I do not use push button start, I like starting my E400 with its FOB key.

I do not know what frequency is used for Mercedes FOBs key of today, but this information is probably correct, because OEM will follow ITU recommendation for licence free frequency if low power
https://en.wikipedia.org/wiki/Remote_keyless_system
https://en.wikipedia.org/wiki/LPD433 << 433 to 434 Mhz
https://www.enocean.com/fileadmin/re...-buildings.pdf <<< 315 Mhz use

I think these 2 frequencies will be the number 1 suspect in your garage Pete.
Wifi router or similar will be next, but not suspect #1, since 2.4 ghz and 5Ghz is so far away from 315 - 433 Mhz , but they can leak other frequencies too.

This is a 315 & 433 Mhz scanner
http://www.security-warehouse.com/ph...y-chipset.html

Good luck...


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Old 02-13-2019, 12:45 AM
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What frequency does a garage door opener use? The third stage of garage door opener technology uses a frequency spectrum range between 300-400 MHz. <----------- maybe this might be part of problem. Aluminum/tin foil the bottom cover of the garage opener? rofl Change garage opener frequency?
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