How.to get hands free trunk to open?
Thread Starter
Super Member
Joined: Dec 2004
Posts: 635
Likes: 68
From: Raleigh, NC
2020 S560 4Matic
How.to get hands free trunk to open?
Can anyone get their trunk to open with their foot? I think I’m going too far underneath. Yes I’ll read the owner’s manual. I just can get it to work 1 time out of 10.
Super Member
Joined: May 2011
Posts: 975
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Works for me pretty reliably as long as car is not too dirty.
Important to do motion up and down, not side to side.
Important to do motion up and down, not side to side.
Out Of Control!!
Joined: Nov 2018
Posts: 11,455
Likes: 5,352
From: San Francisco Bay Area
2019 C63CS
It is a bit finicky in my experience. Generally when it's not working then I'm kicking too close to the bumper or I'm kicking too fast. You have to step back a bit and don't try to kick the ball out of the field 
. I often have to kick two or three times. It also seems to work better if the car is unlocked first. That seems to wake it up.
. I often have to kick two or three times. It also seems to work better if the car is unlocked first. That seems to wake it up.
Last edited by superswiss; Mar 4, 2024 at 11:59 PM.
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Joined: Feb 2003
Posts: 1,416
Likes: 342
From: Charlotte, NC
Had: 1987 300TD, Had: 2004 C230 Sport Sedan, Have: 2014 E350 Sport, Have: 2019 S450
When we purchased the W222, the salesman showed us by kicking under the license plate, straight under & back.
We can now open with a kick reliably on both cars. Seems we were doing it wrong for 8 years….
Senior Member
Joined: Mar 2010
Posts: 477
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2016 S550
You kick directly underneath the center of the back of the car (as mentioned, where license plate is). Kick under the car, forward and back, not side to side or up and down. Literally just stick your feet under and pull it back, not too fast but not too slow. Maybe 1-2 seconds. Works 90% of the time for me, when it doesn’t work it’s usually because the car is perhaps car is dirty underneath or I kicked too fast. I use this feature almost every time I open the trunk because I don’t want to touch the car’s dirt or dust and dirty my hands. I always close the trunk with the button and it bothers me that a lot of people close the trunk by touching the trunk lid’s exterior.. they tend to swipe dirt away and leave behind their handprint lol
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MBWorld Fanatic!
Joined: Feb 2003
Posts: 1,416
Likes: 342
From: Charlotte, NC
Had: 1987 300TD, Had: 2004 C230 Sport Sedan, Have: 2014 E350 Sport, Have: 2019 S450
Thread Starter
Super Member
Joined: Dec 2004
Posts: 635
Likes: 68
From: Raleigh, NC
2020 S560 4Matic
MBWorld Fanatic!
Joined: Aug 2007
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From: Pacific Northwest
2001 S600 V12 Sold, 2011 Jaguar XFR Sold, 2017 S550 4-Matic, 2018 S63 AMG Sedan
Mine works pretty much all th time, I can only remember once when it didn't work. Same thing for my previous W222, worked like a charm. Main thing is to go slow like the previous posts said. I'd also add to give it a second to move, not quite a full second. And I can tell you it works better than on my wife's Venza, which always takes longer to react.
Thread Starter
Super Member
Joined: Dec 2004
Posts: 635
Likes: 68
From: Raleigh, NC
2020 S560 4Matic
Mine works pretty much all th time, I can only remember once when it didn't work. Same thing for my previous W222, worked like a charm. Main thing is to go slow like the previous posts said. I'd also add to give it a second to move, not quite a full second. And I can tell you it works better than on my wife's Venza, which always takes longer to react.
Thread Starter
Super Member
Joined: Dec 2004
Posts: 635
Likes: 68
From: Raleigh, NC
2020 S560 4Matic
I think it’s called Hands Free Access. I can’t find the code. I don’t find it useful. I just have my butler open the trunk. He waits by the car until I’m done shopping. He complains about the rain but isn’t that why he gets paid?
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Joined: Aug 2007
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From: Pacific Northwest
2001 S600 V12 Sold, 2011 Jaguar XFR Sold, 2017 S550 4-Matic, 2018 S63 AMG Sedan
Option Code: 871 SENSORS FOR TRUNK LID OPENING/CLOSING
Here's the video showing how it works, remember the car must be turned off for it to work:
Here's the video showing how it works, remember the car must be turned off for it to work:
Senior Member
Joined: Mar 2022
Posts: 409
Likes: 211
From: Atlanta, GA
2020 S450 4Matic, 2022 GLS450 4Matic, 2015 C300
Option Code: 871 SENSORS FOR TRUNK LID OPENING/CLOSING
Here's the video showing how it works, remember the car must be turned off for it to work: https://www.youtube.com/watch?v=SUw2XcWHFb0
Here's the video showing how it works, remember the car must be turned off for it to work: https://www.youtube.com/watch?v=SUw2XcWHFb0
871 HANDS-FREE ACCESS
Member
Joined: Jun 2022
Posts: 224
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From: Southwest Florida
2019 S560 4MATIC Sedan
If it doesn't work then maybe this.
Summary:Hands-free access (HFA) may be temporarily nonfunctional or functional only after several clicks. It is caused by the HFA control unit. Install HFA control unit with part number A167 905 02 00 or successor and then perform SCN coding of HFA control unit.
Cause: May be due to the HFA control unit.
Remedy: Install HFA control unit with part number A167 905 02 00 or successor and then perform SCN coding of HFA control unit.
2017-2019 E300 2017-2019 E300 4MATIC 2018 E400 2018 E400 4MATIC 2017-2018 E43 AMG 4MATIC 2019 E450 2019 E450 4MATIC 2019 E53 AMG 4MATIC 2018-2019 E63 S AMG 4MATIC 2018-2019 S450 2018-2019 S450 4MATIC 2018-2019 S560 2018-2019 S560 4MATIC 2018-2019 S63 AMG 4MATIC 2018-2019 S65 AMG
Mercedes-Benz TSB LI80.61-P-069910
Hands-Free Access Temporarily NonfunctionalSummary:Hands-free access (HFA) may be temporarily nonfunctional or functional only after several clicks. It is caused by the HFA control unit. Install HFA control unit with part number A167 905 02 00 or successor and then perform SCN coding of HFA control unit.
Cause: May be due to the HFA control unit.
Remedy: Install HFA control unit with part number A167 905 02 00 or successor and then perform SCN coding of HFA control unit.
2017-2019 E300 2017-2019 E300 4MATIC 2018 E400 2018 E400 4MATIC 2017-2018 E43 AMG 4MATIC 2019 E450 2019 E450 4MATIC 2019 E53 AMG 4MATIC 2018-2019 E63 S AMG 4MATIC 2018-2019 S450 2018-2019 S450 4MATIC 2018-2019 S560 2018-2019 S560 4MATIC 2018-2019 S63 AMG 4MATIC 2018-2019 S65 AMG
