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Old 03-13-2016, 10:48 AM   #463
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Can you please help me to understand? It looks like the headlamp washer will spray every single time when I spray the windshield if the vehicle lights are on. And when the vehicle lights are off - the headlamps washer is not active.
Am I right?

That's the way I read it. With lights off windshield washer should not also activate the headlight washer. It's nice to know that Airstream has added headlight washer option to the Interstates. My 2013 doesn't have it.


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Old 03-13-2016, 07:37 PM   #464
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Thank you for confirming, Mike.
But this option isn't an Airstream's, this is a Mercedes' option.
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Old 03-13-2016, 07:51 PM   #465
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Thank you for confirming, Mike.
But this option isn't an Airstream's, this is a Mercedes' option.
I think he meant that Airstream now orders the Mercedes Sprinter w/ the headlite washer option.
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Old 03-13-2016, 07:51 PM   #466
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I have also another topic to discuss and to make clear for everyone who doesn't know (including myself)

That is about the front wheels hub spacers that we all have who's AI based on the 3500 Sprinter model.

Why these wheel spacers/adapters have been engineered by the car maker - because of the larger brake calipers in comparison with the 2500's model, or because of the wider wheels? Knowing that installation of the wheel spacers without widening the tires caused change of the wheel offset and subsequent overloading hub bearings, I have doubts the manufacturer designed them just for esthetic look of Alcoa rims...
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Old 03-13-2016, 08:23 PM   #467
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Spacers also put more stress on the lugs.
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Old 03-13-2016, 08:56 PM   #468
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Wheel and hub centric spacers shouldn't add any stress to the lugs. I has custom spacers made to fit 1994-2004 Mustang wheels on my '65 Mustang.

These guys did my spacers: http://www.motorsport-tech.com/wheel_spacers.html

They weren't fast (and lost my order) but the end product was nice.
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Old 03-13-2016, 09:00 PM   #469
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Knowing that installation of the wheel spacers without widening the tires caused change of the wheel offset and subsequent overloading hub bearings, I have doubts the manufacturer designed them just for esthetic look of Alcoa rims...
I haven't looked at a dismounted Alcoa rim and a stock steel rim to compare their dimensions.

What I do know is that the front track width on my 2012 Interstate is still within the published limits for 2011 Sprinter vans. Namely, between 67.2" and 68". That at least is easy enough to check with just a tape measure. So I can only conclude that the spacers serve to put the tires back where they're supposed to be with the aftermarket rims.
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Old 03-13-2016, 10:09 PM   #470
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Protagonist is right, the wheel adapters we have are designed to put weels back in, to make the correct offset to a proper center line. Below are all Mercedes factory wheels, and all of them are 3500 model. So, this is not an aftermarket spacers/adapters, these are a Mercedes engineering. But question is why? For example, 2500 model does not have it. I did not ask an MB technician about it, but for my logic it is possibly because 3500 has a bigger brake caliper. What do you think?
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Old 03-13-2016, 10:13 PM   #471
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Old 03-13-2016, 10:15 PM   #472
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And mine chassis as well:
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Old 03-13-2016, 10:34 PM   #473
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To LB3:
Any wheel spacers more than a quoter inch in width, installed without reason, regardless of which vehicle they installed to, car or truck, are in fact changing the factory offset, and extends the engineered trajectory of a suspension play, subsequently shortening the life of wheel bearings, lugs, steering ball joints, and tire rod ends.
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Old 03-13-2016, 11:13 PM   #474
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Wheel and hub centric spacers shouldn't add any stress to the lugs. I has custom spacers made to fit 1994-2004 Mustang wheels on my '65 Mustang.

These guys did my spacers: http://www.motorsport-tech.com/wheel_spacers.html

They weren't fast (and lost my order) but the end product was nice.
So moving the lever arm out by the thickness of the spacer doesn't put more stress on the lug?

I have seen spacers designed to bolt on the original lugs and with lugs on the spacer which wouldn't put additional stress on the lugs but would still add stress to the wheel bearings.

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Old 03-14-2016, 01:56 AM   #475
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Yes, I agree, if they installed for esthetic with changing the offset, they overload the engineered characteristics of suspension parts.
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Old 03-14-2016, 06:42 AM   #476
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Wheel centric spacers have a lip that fits inside the wheel of the vehicle. This lip transfers the weight of the vehicle to the wheels and keeps the lugs in tension instead of adding a shear component to the stresses on the lugs. Hub centric spacers fit over a lip on the hub and accomplish the same thing. So long as the spacer is carrying all the vehicle loads the lugs remain in tension.

If the goal is to get a different set of wheels back to where the originals were located, there is no additional suspension stresses unlike when a teenager (driving a ricer) attempts to move their wheels outward into the adjacent lane of traffic. This wider track changes the suspension geometry and places additional stress on he wheel bearings in particular.

In their intended purpose, wheel spacers should be considered a modification to the wheel back spacing and not an extension of the hub.
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