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Old 09-02-2016, 08:03 PM   #15
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Ah, thanks. How well does it work in passive mode without the fan running? To conserve power, often we open our fan cover but don't run the motor. It is also quieter that way.
Works very well in that mode. I leave the roof vent open and several of the rear side windows whenever I park in warm weather.
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Old 09-02-2016, 08:05 PM   #16
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Update:

9/2 got my Interstate back from the MB dealer just now, drove home about 15 miles. Doesn't drop D to N anymore, but there is still this growl or shudder as you slow to a stop, dealer says since I have air suspension he believes its throwing off the angle of the drive shaft and forcing it to make that noise(I think he's BS-ing me). He noted that it doesn't shudder in N as you come to stop only in D. It's an AS issue due to the motorhome mods and MB is not covering it. I asked if there will be ill effects with that noise and he believes there won't be. I'm just glad to have it back with a new transmission and torque converter. The whole instrument cluster was also changed out, I guess it's all one piece. So far so good. I'm going to go to my AS dealer and test drive another Interstate with air suspension to see if it growls too. Have a nice weekend!
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Old 09-02-2016, 08:18 PM   #17
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I've had a similar issue with my 2011 Sprinter service van almost from the onset. MB sent a factory engineer to my Naples dealer and he spent 3 full days investigating the problem.

After doing many precise measurements, he determined that the rear airbags I was using caused the driveshaft to enter the rear pumpkin at an extreme angle. It was the added height of the suspension that was causing the vibration.

He confirmed this by removing the airbags which eliminated the vibration.

I asked if it was a problem and he said no, so I have been driving with the vibes for over 130,000 miles with no other issues.



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Old 09-02-2016, 08:20 PM   #18
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Good idea to test drive another one. I have a '16 with the air suspension and no issues. I'm wondering if what you are hearing is the engine braking when slowing down. This is normal and it does have a bit of a growling sound. Like a muted J-Brake you find on big rigs.
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Old 09-02-2016, 08:28 PM   #19
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Originally Posted by dapolrbear View Post
Update:

9/2 got my Interstate back from the MB dealer just now, drove home about 15 miles. Doesn't drop D to N anymore, but there is still this growl or shudder as you slow to a stop, dealer says since I have air suspension he believes its throwing off the angle of the drive shaft and forcing it to make that noise(I think he's BS-ing me). He noted that it doesn't shudder in N as you come to stop only in D. It's an AS issue due to the motorhome mods and MB is not covering it. I asked if there will be ill effects with that noise and he believes there won't be. I'm just glad to have it back with a new transmission and torque converter. The whole instrument cluster was also changed out, I guess it's all one piece. So far so good. I'm going to go to my AS dealer and test drive another Interstate with air suspension to see if it growls too. Have a nice weekend!
The VB Airsuspension is a MB approved option. If you don't get satisfaction from the Airstream dealer you could contact VB Air direct for advice.

Gertjan Meijer
VB-Airsuspension North America
www.vb-usa.com

Here is one of Gertjan's recent posts on the Sprinter-Forum:

"06-15-2016, 05:18 PM

Re: VB Air Suspension
This is Gertjan Meijer speaking on behalf of VB-Airsuspension. I would like to reply to a couple of questions asked recently in this topic. First, our air ride suspension products we sell are approved by Mercedes-Benz. However, only certified VB-Installers are able to install them and this is not possible directly from Mercedes-Benz. The companies performing retrofits are listed at our website www.vb-usa.com. Besides this we have a couple of manufacturer's (like airstream) using our system but do not offer a retrofit solution (they are not listed yet on our website). It is correct that we built 1 unit in South Carolina. This was done by an upfitter near the factory but we don't work together with this company anymore. Good news for the people living on the east-coast, we are going to add an VB-Installer in Charlotte, North Carolina within a few weeks. The data will be published when the training course has been succesfully completed. Regards Gertjan"

http://www.sprinter-source.com/forum...871#post465871
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Old 09-02-2016, 08:31 PM   #20
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Does the VB suspension preclude rotating the axle to decrease the pinion angle?
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Old 09-02-2016, 10:25 PM   #21
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Update:

9/2 got my Interstate back from the MB dealer just now, drove home about 15 miles.


That's awesome! Very good work by your MB dealer to get both the trans and dash replaced so quickly for you.

Now take her out over this long weekend and ENJOY!
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Old 12-08-2016, 12:08 PM   #22
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This is very interesting. I had a thread on this very topic of shudder after picking up my 2016 AI last summer. Happens on the downshift between 20 - 30 mph. Doesn't matter if I'm braking or not.

Last year MB said they couldn't find the problem and just sent me away. Initially they thought it was a braking problem. I took the AI to an independent mechanic who determined in was downshifting in a lower gear. He said that sometimes an excess of trans fluid will cause this. However, he couldn't do anything about it because MB won't let anyone else work on their vehicles - even though he felt pretty confident he could get to the bottom of it.

The problem continued. Just today I picked the AI back up from my local MB shop after a year of frustration with no correction of the problem. The MB mechanic told me that the fluid level was fine, that they couldn't determine what the problem was, and that there is nothing they can do. He blamed the problem on the amount of weight and distribution of weight caused by the AS "upfitting." That sounds strange to me but I'm no mechanic.

I asked him two questions:
1. Is this causing damage to the vehicle. (After a year and a half of this happening surely they would see damage of some kind.) He said no.
2. Is a failure of the vehicle because of this problem going to result in my experiencing a horrible death on the interstate when something happens. He said no - that a transmission problem would result in the vehicle either shifting to some sort of "default" mode or just not operating. But, I won't "fall apart and crash."

When I brought this issue up last year a forum member commented that this van is, after all, a commercial cargo van and those are going to make noise and be rough. Okay. I can live with that if that's truly what's happening.

Sometimes I wonder that I'm being told something because I'm female and not expected to know the difference. But, it sounds like other people are also being given answers that are just guesswork.
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Old 12-08-2016, 12:33 PM   #23
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This is very interesting. I had a thread on this very topic of shudder after picking up my 2016 AI last summer. Happens on the downshift between 20 - 30 mph. Doesn't matter if I'm braking or not. ........

Sometimes I wonder that I'm being told something because I'm female and not expected to know the difference. But, it sounds like other people are also being given answers that are just guesswork.
There are a lot of so called Sprinter mechanics at Mercedes dealers who are just guessing. Its a sad state. If you are ever up in Pennsylvania area schedule a stop at Sum Motors in Mechanicsville and have them look at it. They have a great bunch of knowledgeable Sprinter mechanics.
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Old 12-08-2016, 03:36 PM   #24
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If you really think it's a tranny problem ( and I blew out the trans on my original 2004 Sprinter @115K), look up Silver Star transmissions in OK and get their take on the issue.

The are rebuilders of Mercedes trannies and the DEFINITELY know the product!!!!


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Old 12-09-2016, 12:11 PM   #25
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My shudder seems to have gone away or I don't notice it anymore. It was definitely drive line related, mine would be silent if you shift to N as you come to a stop. Dealer couldn't figure it out and blamed the rear air suspension, saying that it put the drive shaft at an angle out of spec.

To continue my misadventures, I had to have the AC compressor replaced at 4000 miles. I noticed the bottom of the compressor covered in oil, I thought it was leaking engine oil, but it turned out to be the lube inside the AC compressor. I haven't even started to address to Airstream the crappy fit and finish of the side mouldings(plastic chrome and painted piece) that covers the factory Mercedes black plastic moulding. It's like half an inch short here and there, the painted moulding is wavy and not smooth, and parts of the moulding is lifting off here and there.
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Old 12-23-2016, 01:07 AM   #26
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I think it is important to push with both AS and Mercedes to have your expectations met.

The more warranty reports on items the more attention they get with the company that made them. I am sure the powered shades are.

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