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4Matic suspension specs...Airmatic as well?

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Old Mar 11, 2010 | 05:57 AM
  #26  
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Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
Originally Posted by MBStar
Is DI inherently problematic / more expensive to maintain? or are you referring to the
Turbo induction? or to the potential for drive train component failure from
increased torque / power?

Whoops, I meant F/I! I have less confidence in the reliability (long term) of most F/I cars, not to mention, more parts, etc.

Interesting 220s about the DI though, didn't know that about 'em.
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Old Mar 11, 2010 | 09:46 AM
  #27  
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2010 E63, Iridium Silver, Black, Dark Ash, Distronic Plus, Night Vision, Premium
Originally Posted by 220S
... the intake is not being washed with fuel, then carbon can build up. Apparently because the PCV allows for oil to come into contact with the valve heads and there's no fuel to clean it so it cakes on as baked carbon. This is been noted in recent Porsche and Audi motors...
Thanks for this explanation. DI seems like an inherently better system made
truly functional by the advent of the digital engine management, yet even then
the devil is oin the mechanical factors such as this. Has there been any
significant failure rate with AUDI?

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Old Mar 12, 2010 | 07:50 PM
  #28  
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Originally Posted by 220S
(although DI isn't new; it was used back in the late 90s.) ]
MB used it in the mid 50's in the 300SL.

Last edited by MBNUT1; Mar 12, 2010 at 07:55 PM.
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Old Mar 12, 2010 | 10:49 PM
  #29  
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Originally Posted by MBNUT1
MB used it in the mid 50's in the 300SL.
Yeah, that's right. And before that it was used in WWII airplanes.

I was referring primarily to modern DI which made a come back of sorts in the late 1990s.
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Old Mar 13, 2010 | 09:22 AM
  #30  
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Carbon on the valves (A little OT)

The first I heard about "Carbon on the valves" was from Walter Matthau in A new leaf back in 1971.

Hilarious and highly recommended.
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Old Mar 13, 2010 | 06:58 PM
  #31  
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Are there any specific recommendations for maintaining airmatic? I don't get the sense there is much you can do.
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Old Mar 14, 2010 | 05:25 PM
  #32  
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Originally Posted by mg-E550
Are there any specific recommendations for maintaining airmatic? I don't get the sense there is much you can do.
Don't hit major potholes. Next time you change your oil just visually inspect the rubber boots and air lines.

And if you sense that a strut is leaking, then have it replaced right away so that you don't also burn out the pump. SDS will tell you if you have a leak, and you can also visually see that the car doesn't sit level at all four corners the next morning after you've parked it.

Beyond that, don't worry about it.
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Old Mar 15, 2010 | 09:25 AM
  #33  
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I'm moving to the LA area -- I'm looking to buy the E550. Is there much reason to buy 4MATIC in So. Cal.? I can see if I was living in the North East with snow and rain...
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Old Mar 15, 2010 | 12:36 PM
  #34  
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Originally Posted by AJ4Value
I'm moving to the LA area -- I'm looking to buy the E550. Is there much reason to buy 4MATIC in So. Cal.? I can see if I was living in the North East with snow and rain...
No.

We get rain from about December to April. But it comes in big dumps, it's not constant. And then the freeways are crazy because nobody knows how to drive in the rain. So even if you have AWD, it would be the other drivers you need to watch out for (it's equivalent to a big snow storm in NYC.)

From about May to November there is no rain. None.

If you want to go up north into the mountains during the winter, then AWD can come in handy. But you still don't really need it. Rent a SUV or something for those times.
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