Air re-circulation with engine off
Thread Starter
Member
Joined: Apr 2010
Posts: 97
Likes: 31
From: Houston, TX
2012 E350, P2
Air re-circulation with engine off
Does the outside air gets in our W212 cabin while the car is parked with engine off?
I know many other cars do when you turn off the engine while AC running (re-circulation off). And vice versa, with re-circulation on, the outside air gets blocked from getting in with engine off/car parked.
It's very useful. During winter, you can close it to keep the freezing air from getting in and open in summer to let some fresh air in/heat out.
I know many other cars do when you turn off the engine while AC running (re-circulation off). And vice versa, with re-circulation on, the outside air gets blocked from getting in with engine off/car parked.
It's very useful. During winter, you can close it to keep the freezing air from getting in and open in summer to let some fresh air in/heat out.
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Joined: Dec 2015
Posts: 1,190
Likes: 68
From: Charlotte, NC
2014 E350 4M Diamond Silver
Does the outside air gets in our W212 cabin while the car is parked with engine off?
I know many other cars do when you turn off the engine while AC running (re-circulation off). And vice versa, with re-circulation on, the outside air gets blocked from getting in with engine off/car parked.
It's very useful. During winter, you can close it to keep the freezing air from getting in and open in summer to let some fresh air in/heat out.
I know many other cars do when you turn off the engine while AC running (re-circulation off). And vice versa, with re-circulation on, the outside air gets blocked from getting in with engine off/car parked.
It's very useful. During winter, you can close it to keep the freezing air from getting in and open in summer to let some fresh air in/heat out.
Unlike other cars(non-luxury ones), which stays on..!
Thread Starter
Member
Joined: Apr 2010
Posts: 97
Likes: 31
From: Houston, TX
2012 E350, P2
I'm assuming when you turn off the engine while the AC is running (with re-circulation off), it keeps it open. And when you turn off the engine while AC is already off, it blocks the outside air from getting in. I could be wrong.
I have a habit of switching the AC off before turning the engine off. With windows closed, the temperature inside the car can easily reach over 120 degrees within an hour in Texas summer. But since the last few days I've been turning off the engine with AC running (with re-circulation off) and I've noticed very less heat inside the car when parked open under Texas sun. I want it open for the heat to escape just like other cars do. I need a confirmation from someone..
I have a habit of switching the AC off before turning the engine off. With windows closed, the temperature inside the car can easily reach over 120 degrees within an hour in Texas summer. But since the last few days I've been turning off the engine with AC running (with re-circulation off) and I've noticed very less heat inside the car when parked open under Texas sun. I want it open for the heat to escape just like other cars do. I need a confirmation from someone..
Last edited by zeemob; Jul 19, 2017 at 01:48 PM.
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Joined: Mar 2014
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From: West Central Florida
2011 E550 P2 4M Sedan
Why not just take off the plastic cowl and take a look? It is just held on by tabs and very easy to get one/off (even for me).
For a while, I was obsessing over the smell in my AC system and would open the cowl from time to time. IIRC it was normally closed even though I typically don't turn re-circ on while driving.
EDIT - just checked and the recirc flap was open (i.e not on). So I guess my memory is bad. Well, it is the second thing to go...
For a while, I was obsessing over the smell in my AC system and would open the cowl from time to time. IIRC it was normally closed even though I typically don't turn re-circ on while driving.
EDIT - just checked and the recirc flap was open (i.e not on). So I guess my memory is bad. Well, it is the second thing to go...
Last edited by thefisch; Jul 19, 2017 at 09:11 PM.
