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GLC Class (X253) Produced 2016-2022

Tunnel function

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Old Dec 27, 2017 | 04:50 PM
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DrGH
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GLC300 2018
Tunnel function
Hello,

I can’t get the tunnel function to work on my GLC2018... I start the car, open the windows (partially), press and hold the air circulation button, .... nothing happens!

Any tips?

Is it working for any one with a new 17/18 GLC in Canada?
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Old Dec 27, 2017 | 06:34 PM
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ajmtbm
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Mercedes-Ben GLC300 4Matic
didnt work for me either on a 2017
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Old Dec 28, 2017 | 09:43 AM
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2016 GLC300 4Matic
For the U.S. version of the GLC (at least the 2016 model year with navigation) the air-recirculation mode switches on automatically in a tunnel and then automatically switches off after 10-30 minutes depending on outside air temperature and the settings of other climate control functions.
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Old Dec 28, 2017 | 09:43 PM
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GLC300 2018
Originally Posted by guido3
For the U.S. version of the GLC (at least the 2016 model year with navigation) the air-recirculation mode switches on automatically in a tunnel and then automatically switches off after 10-30 minutes depending on outside air temperature and the settings of other climate control functions.
by tunnel function I meant: Press and hold air circulation button before tunnel to close all windows/sunroof; do same for after tunnel to retrieve window/sunroof setting; please see this ~1-min youtube video:




Last edited by DrGH; Dec 28, 2017 at 11:13 PM. Reason: typo
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Old Dec 29, 2017 | 02:02 PM
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GLC 300 4Matic, Sport+Night
Originally Posted by DrGH


by tunnel function I meant: Press and hold air circulation button before tunnel to close all windows/sunroof; do same for after tunnel to retrieve window/sunroof setting; please see this ~1-min youtube video:
https://youtu.be/IY9-W28k24Q




Yup, mine also doesn't work. 2017 - USA. In these cold months -- I sure do miss REST mode!
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Old Dec 29, 2017 | 04:18 PM
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Mercedes-Ben GLC300 4Matic
Originally Posted by CasemLuke
Yup, mine also doesn't work. 2017 - USA. In these cold months -- I sure do miss REST mode!
i dont understand why they make so many little tweaks for different countries. why bother reprogramming so it can use tunnel; mode or rest function. just give those features to everyone.
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Old Dec 30, 2017 | 11:28 AM
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2021 GLE 450, 2017 GLC 300 4Matic, 2008 FJ Cruiser
GLC300 in the USofA no tunnel function for me either. I’m sure with the right kind of software/cable you can somehow engage it to work.
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Old Dec 30, 2017 | 01:38 PM
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Originally Posted by CasemLuke
Yup, mine also doesn't work. 2017 - USA. In these cold months -- I sure do miss REST mode!
I agree on REST mode.
Had it in my last car and found it brilliant!
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Old Dec 30, 2017 | 03:37 PM
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Tunnel function works on my MY17 43 in the UK.
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Old Dec 30, 2017 | 04:07 PM
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2016 GLC 300
I would first need a tunnel.
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Old Dec 30, 2017 | 06:34 PM
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Originally Posted by MITCH1975
I would first need a tunnel.
I think it could be useful for non-tunnel situations, e.g., passing next to a garbage truck, bad fumes, ...
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