Coupe hatch release

Varinn · 05-06-2016, 10:07 AM

Small question...

When I hit the trunk release button on my remote the trunk unlatches and I can walk up to it and grab it by the bottom to lift it. But it got me wondering if my trunk shocks are meant to be strong enough to fully lift the thing un-assisted once it's been unlatched. Otherwise what's the damn benefit of the button on the key over just using the emblem release/handle if I need to walk to the car and open it manually anyways?

Karacticus · 05-06-2016, 10:33 AM

I'm thinking it's a BMW thing-- I don't get any different action from my E90 3-series.

The HACK · 05-06-2016, 10:43 AM

This might be a physics thing, but if you look at the angle of the shock in relation to the hatch, when it's closed it's parallel to the hatch. Even if it has enough "rebound" to extend, it's exerting force on the same plane as the hatch and does not extend the force perpendicular to the plane of the hatch to push it "up."

On my dad's 545i, There's a spring action, 90º lever on the trunk so when you hit the trunk release, it pops up.

Varinn · 05-06-2016, 11:22 AM

Quote:

Originally Posted by The HACK

This might be a physics thing, but if you look at the angle of the shock in relation to the hatch, when it's closed it's parallel to the hatch. Even if it has enough "rebound" to extend, it's exerting force on the same plane as the hatch and does not extend the force perpendicular to the plane of the hatch to push it "up."

On my dad's 545i, There's a spring action, 90º lever on the trunk so when you hit the trunk release, it pops up.

Good observation, never noticed that! Either way I'm not going to lose any sleep over it, hasn't really ever bothered me that it doesn't spring up and I don't think it will bother going forward either

Roadroach · 05-06-2016, 02:02 PM

I know I've only had my coupe for a few months now - but I never even NOTICED a "hatch release" button my remote.

XMetal · 05-06-2016, 02:14 PM

Speaking about the funking trunk action on the coupe, Has anyone noticed the quirkiness of how the trunk can be open?

1. If the car is locked, you can't simply hit the button on the remote to unlock the trunk. Instead, you have to either:
a) use the key.
b) hit the unlock button to first unlock the driver's door, then you can NOW hit the button on the remote to unlock the trunk?

2. If you just simply unlock the driver's door, pulling the latch handle doesn't unlock the trunk. You'll have to use the remote button?

3. You can only use the latch handle to open the trunk if and only if both doors are unlocked?

inTgr8r · 05-06-2016, 06:55 PM

#1 is because it's a hatch and you would be able to gain access to the otherwise locked car.
( cars with a trunk you can't )

Never noticed # 2 and 3 , can't think of a logical reason for that one.

I'm not sure if there's any coding options related to this. ( I haven't seen any)

XMetal · 05-06-2016, 07:51 PM

I don't know...On my X5, which you can also gain access to the car through the hatch; I can use the remote to pop the trunk even if all the doors are locked - you can't do this on the Z4.

Punisher3.0si · 05-06-2016, 09:22 PM

Quote:

Originally Posted by Roadroach

I know I've only had my coupe for a few months now - but I never even NOTICED a "hatch release" button my remote.

It's the button under the BMW symbol

Punisher3.0si · 05-06-2016, 09:26 PM

Quote:

Originally Posted by XMetal

Speaking about the funking trunk action on the coupe, Has anyone noticed the quirkiness of how the trunk can be open?

1. If the car is locked, you can't simply hit the button on the remote to unlock the trunk. Instead, you have to either:
a) use the key.
b) hit the unlock button to first unlock the driver's door, then you can NOW hit the button on the remote to unlock the trunk?

2. If you just simply unlock the driver's door, pulling the latch handle doesn't unlock the trunk. You'll have to use the remote button?

3. You can only use the latch handle to open the trunk if and only if both doors are unlocked?

The way you are describing this sounds like you have an aftermarket system? The fob is built into the key on the stock system. I don't have any of the problems that you are describing.

pungo · 05-06-2016, 10:37 PM

Quote:

Originally Posted by Punisher3.0si

The way you are describing this sounds like you have an aftermarket system? The fob is built into the key on the stock system. I don't have any of the problems that you are describing.

+1
Pressing the trunk unlock button on the remote unlocks my hatch. Something is not right with the OP car.

Maybe the coding, check if "TRUNK LID RELEASE ONLY POSSIBLE WHEN UNLOCKED" is "enabled"

Varinn · 05-06-2016, 11:41 PM

Quote:

Originally Posted by pungo

+1
Pressing the trunk unlock button on the remote unlocks my hatch. Something is not right with the OP car.

Maybe the coding, check if "TRUNK LID RELEASE ONLY POSSIBLE WHEN UNLOCKED" is "enabled"

You're mistaking my post with someone else I think, the hatch releases just fine with the remote. My question was more of did anyone's hatch release and pop all the way open on button press which it seems it does not... by design. So I'm all good

XMetal · 05-07-2016, 12:15 AM

Quote:

Originally Posted by pungo

+1
Pressing the trunk unlock button on the remote unlocks my hatch. Something is not right with the OP car.

Maybe the coding, check if "TRUNK LID RELEASE ONLY POSSIBLE WHEN UNLOCKED" is "enabled"

That's very possible. I'll need to look into this coding issue

Vanne · 05-07-2016, 12:15 AM

Lol, you should try lifting that trunk without the struts… you'll soon know why they are there..

pungo · 05-07-2016, 01:47 AM

Quote:

Originally Posted by Varinn

You're mistaking my post with someone else I think, the hatch releases just fine with the remote. My question was more of did anyone's hatch release and pop all the way open on button press which it seems it does not... by design. So I'm all good

My bad, I meant XMetal.
BTW you can add the pop up type stops (like kind for the hood) that will pop the hatch further open when you unlock it, but it won't make it open all the way like some SUVs.

Efthreeoh · 05-07-2016, 05:37 AM

The Coupe trunk unlock button on the key is pointless; you have it correct.

inTgr8r · 05-07-2016, 07:15 AM

Quote:

Originally Posted by XMetal

I don't know...On my X5, which you can also gain access to the car through the hatch; I can use the remote to pop the trunk even if all the doors are locked - you can't do this on the Z4.

Sorry I miss read, I thought it was the trunk release your were talking about, not the remote.

I agree with pungo, check your coding.
My remote works in all situations.

05-06-2016, 10:07 AM	#1
Varinn Private First Class 57 Rep 187 Posts Drives: 2007 Z4MC Join Date: Oct 2014 Location: Vancouver, BC, Canada iTrader: (0)	Coupe hatch release Small question... When I hit the trunk release button on my remote the trunk unlatches and I can walk up to it and grab it by the bottom to lift it. But it got me wondering if my trunk shocks are meant to be strong enough to fully lift the thing un-assisted once it's been unlatched. Otherwise what's the damn benefit of the button on the key over just using the emblem release/handle if I need to walk to the car and open it manually anyways? __________________ 1990 332i 5 speed (OBD2 S52 Swap) 2018 VW Golf R (6spd manual/copper orange metallic) 2008 KTM SuperDuke 990 2007 Z4M Coupe (#1026/1815) SOLD
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05-06-2016, 10:33 AM	#2
Karacticus Second Lieutenant 15 Rep 222 Posts Drives: 2007 Z4 3.0si Coupe Join Date: May 2007 Location: Iowa iTrader: (0)	I'm thinking it's a BMW thing-- I don't get any different action from my E90 3-series. __________________ 2007 3.0si Coupe Dinan Stage I Suspension (Shocks, Struts, Springs), Ground Control Front Camber Plates, Treehouse Racing Front Control Arm Bushings, RTAB Bushing Limiters
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05-06-2016, 10:43 AM	#3
The HACK Midlife Crises Racing Silent but Deadly Class 1821 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	This might be a physics thing, but if you look at the angle of the shock in relation to the hatch, when it's closed it's parallel to the hatch. Even if it has enough "rebound" to extend, it's exerting force on the same plane as the hatch and does not extend the force perpendicular to the plane of the hatch to push it "up." On my dad's 545i, There's a spring action, 90º lever on the trunk so when you hit the trunk release, it pops up. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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05-06-2016, 02:02 PM	#5
Roadroach First Lieutenant 165 Rep 305 Posts Drives: 2006 Z4 3.0si coupe w/stick Join Date: Jan 2015 Location: Austin, Texas iTrader: (0)	I know I've only had my coupe for a few months now - but I never even NOTICED a "hatch release" button my remote. __________________ 2006 Z4 coupe - with HOMELINK! 1966 Mustang GT fastback (too many mods to list) 2015 335i GT 2014 981 Cayman S manual
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05-06-2016, 02:14 PM	#6
XMetal Colonel 1135 Rep 2,866 Posts Drives: Anything Join Date: Apr 2010 Location: SoCal iTrader: (0) Garage List 2008 Z4M Coupe [10.00] 2018 Audi S3 [0.00] 2004 X5 [8.50]	Speaking about the funking trunk action on the coupe, Has anyone noticed the quirkiness of how the trunk can be open? 1. If the car is locked, you can't simply hit the button on the remote to unlock the trunk. Instead, you have to either: a) use the key. b) hit the unlock button to first unlock the driver's door, then you can NOW hit the button on the remote to unlock the trunk? 2. If you just simply unlock the driver's door, pulling the latch handle doesn't unlock the trunk. You'll have to use the remote button? 3. You can only use the latch handle to open the trunk if and only if both doors are unlocked?
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05-06-2016, 06:55 PM	#7
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	#1 is because it's a hatch and you would be able to gain access to the otherwise locked car. ( cars with a trunk you can't ) Never noticed # 2 and 3 , can't think of a logical reason for that one. I'm not sure if there's any coding options related to this. ( I haven't seen any) __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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05-06-2016, 07:51 PM	#8
XMetal Colonel 1135 Rep 2,866 Posts Drives: Anything Join Date: Apr 2010 Location: SoCal iTrader: (0) Garage List 2008 Z4M Coupe [10.00] 2018 Audi S3 [0.00] 2004 X5 [8.50]	I don't know...On my X5, which you can also gain access to the car through the hatch; I can use the remote to pop the trunk even if all the doors are locked - you can't do this on the Z4.
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05-07-2016, 12:15 AM	#14
Vanne Down Under!! 1621 Rep 4,294 Posts Drives: 2007 Z4MC Join Date: Mar 2013 Location: Dubai iTrader: (4)	Lol, you should try lifting that trunk without the struts… you'll soon know why they are there.. __________________ 2007 EuroSpec Z4///MC - Building/Developing Z4 GT3 Powered by
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05-07-2016, 05:37 AM	#16
Efthreeoh General 17309 Rep 18,733 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	The Coupe trunk unlock button on the key is pointless; you have it correct. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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