E350 ECO mode air conditioning
Thread Starter
Junior Member
Joined: Mar 2016
Posts: 36
Likes: 1
2014 E350 4matic
E350 ECO mode air conditioning
Today during a red light stop, the ECO mode activated and shut down the engine. The air conditioning is still on but the air wasn't "cold enough". It is code again after the engine turned on. It happened twice today. Is that normal? Is this a sign of the aux battery is dying?
Member
Joined: Feb 2016
Posts: 86
Likes: 24
From: Palatine, IL
2013 E350 4Matic
Engine needs to run in order for the AC Compressor to operate and provide circulation in the AC system. After the engine is shut down the AC Coil will remain cold for 30seconds or so, it has no circulation due to engine being off, while warm air from the cabin is still forced through it.
Last edited by s140s; May 20, 2016 at 10:49 PM.
Thread Starter
Junior Member
Joined: Mar 2016
Posts: 36
Likes: 1
2014 E350 4matic
This is how I observed the system works too. The air wasn't as cold. I lower the temperature but not making difference. Once the engine is up, it is icy cold again.
Sounds like not a system issue. Just need to disable ECO if it's not cold enough.
Sounds like not a system issue. Just need to disable ECO if it's not cold enough.
Engine needs to run in order for the AC Compressor to operate and provide circulation in the AC system. After the engine is shut down the AC Coil will remain cold for 30seconds or so, it has no circulation due to engine being off, while warm air from the cabin is still forced through it.
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MBWorld Fanatic!
Joined: Jan 2014
Posts: 1,053
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From: USA - Minnesota
2014 GL350
That said, Mid City Engineering has an ECO Kill device for the W212.
http://www.midcityengineering.com/oe...-mercedes-benz
Senior Member
Joined: Feb 2016
Posts: 468
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From: UK
E250 AMG Sport Convertible
Starter motor won't be any more likely to fail with ECO on or off, they have been tested and developed to do a huge number of starts over what any of us will put it through in its lifetime.
Senior Member
Joined: May 2016
Posts: 397
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From: California
2016 E 250 Bluetec
This is normal, same thing happens on the 2016 models, i usually turn off ECO because it generally never comes on when i would like it too, like in a drive thru scenario. Plus, there is a slight delay when you take off from a red light while in ECO mode, which i do not enjoy at all. I will sacrifice the few drops of diesel i save and just turn it off.
