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Old 01-10-2016, 07:48 AM   #1
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Crash sensor

My crash sensor on the passenger side is acting up.. It goes off every few minutes, I looked through the manual to see which fuse it is but I'm not finding it..

Anyone know which fuse it is? So I can shut the damn thing off..

We are still 700 miles from home and if I have to hear that thing I will probably go insane!! 😜
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Old 01-10-2016, 07:54 AM   #2
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Crash sensor? Are you talking about air bag light?
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Old 01-10-2016, 08:33 AM   #3
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The sensor that beeps when you get too close to an object... The parking sensor, just remembered what it was called.. Forgive me I'm traveling and a bit tired..
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Old 01-10-2016, 08:43 AM   #4
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Are the sensors clean? A bug or dirt can give false alarms. If it is a camera system, same applies. Other that that, you may have a system problem which only a dealer can diagnose. Still a bit unclear if this is a parking assist system or a forward alert system for sensing cars in front of you.
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Old 01-10-2016, 08:44 AM   #5
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Clean the sensors and look behind bumper for obvious connector issues. Try unplugging and replugging them.
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Old 01-10-2016, 09:48 AM   #6
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Might need to be re-aimed. If it vibrated loose and is pointing at the ground it will think you're too close to something.
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Old 01-10-2016, 11:17 AM   #7
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I found the button to turn the sensors off but then the passenger side window started to go down on its own...

It rained all night and it was in the high 30s, I'm thinking some water got in and messed something up.. Now that we are in the high 50s everything is working okay.. Must of been too cold and wet or we have a gremlin..
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Old 01-10-2016, 06:55 PM   #8
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I found the button to turn the sensors off but then the passenger side window started to go down on its own...

Humm, tell us more. I don't know of any button to disable the parking sensors!


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Old 01-10-2016, 09:17 PM   #9
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Humm, tell us more. I don't know of any button to disable the parking sensors! ....

Parktronic can be disabled by switch in lower center console. She page from owners manual below.
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Old 01-11-2016, 12:21 AM   #10
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Parktronic can be disabled by switch in lower center console. She page from owners manual below.
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Thanks Mike, for some reason I never noticed this switch. Must take a closer look when I get it back from the dealer.


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Old 01-11-2016, 06:23 AM   #11
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I never noticed either, but I'm sure glad they put one in.. Now I just need to figure out what happened..

Why did it malfunction and why did the passenger side window start to go down on its own...

Moisture must of done something to the electronics on that side of the coach..

Just glad it's a Mercedes issue and not airstream.. My local airstream service departments are a pain to deal with.. Mercedes is wonderful, nice people, nice waiting room with snacks and comfortable chairs..
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Old 01-11-2016, 09:23 AM   #12
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I never noticed either, but I'm sure glad they put one in.. Now I just need to figure out what happened..

Why did it malfunction and why did the passenger side window start to go down on its own...

Moisture must of done something to the electronics on that side of the coach..
......
Moisture and also thermal expansion and contraction can do strange things. When you said temps in the 30's and rain, my reaction was, "Oh yeah - been there, done that". The vehicle is not insulated like a fixed structure. If you are running the house heater in those conditions, I bet that you are going to have significant condensation in unexpected nooks and crannies.

This is certainly true of my T1N. I've purchased a bulk package of water-absorbing gel so that I can fashion little absorbent socks and pads and place them prophylactically in problem areas as those areas make themselves apparent. Yet another sewing project on my to-do list.

During our New Years Eve camping trip, it also became brilliantly apparent to me that the T1N's cab doors are not adequately insulated. I fear the potential for condensation there, as well as it being a comfort issue.

This issue is certainly not limited to Mercedes or Airstream. I have an analogous sensor problem in my Toyota Sienna, but only above 94 degrees F and only when I make a right turn, that one owing to thermal expansion rather than moisture. Under those conditions it thinks the front passenger door is swinging open in an uncontrolled manner as I am traveling. Even though I have told myself that it's a false alarm, it still frazzles my nerves every time it goes off and the initial limbic reaction ensues.
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Old 01-11-2016, 05:13 PM   #13
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If you are running the house heater in those conditions, I bet that you are going to have significant condensation in unexpected nooks and crannies.
Why does running the furnace cause more moisture than the vehicle heater?
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Old 01-12-2016, 06:02 AM   #14
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Why does running the furnace cause more moisture than the vehicle heater?
It partly comes down to static vs. dynamic conditions. An Interstate set up to camp in cold, wet weather has a large temperature differential between the outside and the inside and (importantly) it tends to maintain that differential for a longer period of time (overnight) and in conditions characterized by greater air stillness (which promotes condensation) than one would experience during a drive down the road, which can really make a difference. This can be exacerbated if it's raining outside such that people climb into the Interstate already wet. The house furnace will dry out the coats and other materials, but then that water has to go somewhere. Cooking produces even more moisture. Plus the average person loses something approaching a liter of water per day through respiration and perspiration alone, so it all adds up.

The number of exchanges also affects the outcome. One of our supreme annoyances is the mechanism that MB built into the Sprinter which obligates the a/c system to switch off the recirc function every 15 minutes like clockwork. The owner's manual says that's a necessary humidity control measure. It might be the more adaptive option in Germany, but it's completely inappropriate on the subtropical Texas Gulf Coast. We've talked to the local MB dealer about an override, but he says it cannot easily be done. So we physically re-punch that recirc button every 15 minutes in many driving conditions.

Point being, when folks are underway, they are probably exhausting more interior air and moisture than they realize (unless they live in a place like this, in which case the design of the a/c system will sometimes result in a net increase in interior moisture). Not so much when they are parked quietly and the furnace is running.
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