E-Class (W212) 2010 - 2016: E 350, E 550

WEIRD STUFF

Old 07-08-2011, 06:17 PM
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E550
WEIRD STUFF

In my case, 2011 E550 Luxury, P2, all the extras except night vision . . .

The computers in these cars are so busy, the cars do weird stuff that the dealer service people can't explain to us --- at least not without some clear sense that they really don't know what they are talking about.

While this stuff is not defects, and probably not serious, maybe we need a thread to see if correspondents here can explain what's going on with our software-driven, maybe over-engineered cars.

I'll start with one WEIRD THING:

After driving the car for half an hour, on a hot day, I can park it in the (hot) garage, and come out up to 4 hours later and, without touching the car, hear a fan running. The sound comes from what I assume to be the outside air intake just under the windshield, passenger side. I can't tell for sure if it's also blowing inside the cabin because as soon as you touch the door the car starts doing all kinds of other stuff.

4 hours later???? On battery only???

Does anybody know what's going on???
Old 07-08-2011, 07:58 PM
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2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
Originally Posted by Live Oak
In my case, 2011 E550 Luxury, P2, all the extras except night vision . . .

The computers in these cars are so busy, the cars do weird stuff that the dealer service people can't explain to us --- at least not without some clear sense that they really don't know what they are talking about.

While this stuff is not defects, and probably not serious, maybe we need a thread to see if correspondents here can explain what's going on with our software-driven, maybe over-engineered cars.

I'll start with one WEIRD THING:

After driving the car for half an hour, on a hot day, I can park it in the (hot) garage, and come out up to 4 hours later and, without touching the car, hear a fan running. The sound comes from what I assume to be the outside air intake just under the windshield, passenger side. I can't tell for sure if it's also blowing inside the cabin because as soon as you touch the door the car starts doing all kinds of other stuff.

4 hours later???? On battery only???

Does anybody know what's going on???
It's the evaporator core drying fan which runs after the car has been running with the A/C. This is MB's answer to the mouldy smell problem of some years ago when moisture would collect and not totally drain out of the core.
Old 07-08-2011, 08:40 PM
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AHA!! THANKS!

And I can see the purpose, since I've had that experience in other places I've lived. Of course, here in New Mexico, it's not as common a problem.

Thanks for responding.
Old 07-08-2011, 10:54 PM
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2017 S550 cabrio
My wife's ML does that all the time but I've never noticed it in the E. Good to know that it isn't some sort of malfunction...
Old 07-09-2011, 11:35 AM
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2010 W212, 1985 C10
its a very quiet fan, i can only hear mine if i am close to the hood/windshield on the passenger side
Old 07-09-2011, 01:27 PM
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Current: 2011 W212 Previous: 2008 W211 2006 550 2001 Rover 1997 W210
Originally Posted by HBerman
It's the evaporator core drying fan which runs after the car has been running with the A/C. This is MB's answer to the mouldy smell problem of some years ago when moisture would collect and not totally drain out of the core.
Glad we have this.

My previous ride, a BMW 550 didn't do this so after about 6 months of ownership, it would smell like **** for about 5 mins after starting the ac.
Old 07-09-2011, 02:44 PM
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Mercedes 2011 E350 2010 Range Rover Sport LUX
Originally Posted by EmE247
Glad we have this.

My previous ride, a BMW 550 didn't do this so after about 6 months of ownership, it would smell like **** for about 5 mins after starting the ac.
lol @ starting the car and getting blasted in face with **** smell

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