This is interesting if i can retrofit to my e39...Trunk auto mode.

[bmw7833]

Paging haywire..:4:OK gents here it is IMHO the mother of all mods!!Enjoy the pics an video!Thanks to Roland for driving up from Belgium to code my car!!The Pump:

The Cylinder with pressure hose:

HKM controll module:

Pump in place with HKM module behind:

Mounting the pressure hoses:

Mounting the tilt sensor:

Putting all the wiring in the trunk:

Mounting the close button:

Getting the wires down to the inside of the car.http://www.bimmerboard.com/members/homerraas/original/Image00562.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00563.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00564.jpgMade atemplate for drilling so I can fit the hoses and cylinder:http://www.bimmerboard.com/members/homerraas/original/Image00565.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00566.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00567.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00568.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00569.jpgMounted hoses and cylinder:http://www.bimmerboard.com/members/homerraas/original/Image00570.jpgDONE:http://www.bimmerboard.com/members/homerraas/original/Image00571.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00572.jpgRoland coding the car:http://www.bimmerboard.com/members/homerraas/original/Image00573.jpghttp://www.bimmerboard.com/members/homerraas/original/Image00574.jpgVIDEO:Video proof! ;-)THANKS FOR READING!!

 

[tweiboon]

Who knows to do this ? Is very interesting !!!!!!!!!! WOW!!!!!!!

 

[bimmerholic]

Wow this will be the mod of the year for E39.

 

[bmw7833]

I am kinda interested to do that. From the step by step shown, it looks like quite easy, parts can source from chop shop...Have to verify by haywire 1st.

 

[wobbles]

But needs coding ... will that be tricky to get?

 

[nitedevil]

Bro Lim,

what coding required?

 

[bmw7833]

Bro Lim,

what coding required?

Not sure bro, have to do much much more research. It will be great to me if i have the auto mode in my car.

As i know E53 X5 4.4 has this feature, not sure correct or not.

 

[morrogan]

Got include the anti-trap safety feature? i.e. while half way closing hit something will re-open? It is a must have feature to ensure it will re-open when small kid unintentionally put hand there..just my concern.

 

[moots]

wow neat!uses hydraulics though.imagine if there's a leak....oil all over!
never mind lah.manual open will build my biceps muscles....:stupid:

 

[haywire]

Woah so long I didnt log in suddenly name comes up...

Anyway, I have to admit that I've considered this mod in the past, but I'm not sure if this is available for the sedan E39. Few issues from my brief read-up regarding the system:

1) The one installed above was on an E38. Although the car featured didnt have it originally the auto trunk feature has been an available option to order when the car was new for the E38. It was never available for the E39 sedan. There are systems for E39 Touring though. So my thought is you would have to find an E38 system to retrofit to E39 and make it work.

2) Since the system was never available for E39 sedan I dont know how to code it to the system.

3) Clearance for the hidraulic tubes. The e38 has a longer boot, and looking at these pictures directly, if the hole was to be cut at roughly the same distance from the strut it will be nearly at the edge of the panel towards the rear light:

And this is where a lot of water is pouring down when it rains. I'd hate to introduce another possible rusting spot in my car.

4) Price and availability. Not sure $800 for the system (if you can actually find one) is worth it. Worse still is when it leaks, how much is needed to replace it, and that doesnt include the damage done to the other stuffs down there. Both side of my boot is full of relays and wires and electronics.

5) Wiring. I've had some troubles to install my supposedly 'easy' electric rear blind which is still ongoing due to some extra wires needed. Dont know how the wiring for this system are to be connected.

All that said, there are none of this system selling on eBay currently, but the good news is there have been somebody who apparently has installed the system to an E39!

See here:

http://www.ebay.co.uk/itm/BMW-E39-AUTO-TRUNK-CLOSE-540i-528i-530i-525i-M5-E38-740-/180506131454?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a0700fbfe#ht_689wt_1163


So if there's a will (and lots of $$$$) there will surely be a way! I'll not be pursuing this in the near future as I can see, but who knows I might pursue it if I've run out of projects to do in my car! Currently there are few items still pending so my mind is occupied hehe.

 

[haywire]

And...doubt you can get these in chop shops, if you do you're very lucky perhaps.

 

[tweiboon]

Add 1 more auto, add 1 more maintenance. This is why i choose the e39 which dont have memory seat, memory steering angle and memory fold side mirror. Less headache.

 

[haywire]

Found this in BMW WDS:


Boot Lid Module


Automatic opening and closing of boot lid/tailgate

Function

Automatic opening and closing of the boot lid/tailgate is controlled by the boot lid/tailgate module and the general module of the ZKE III.
The boot lid/tailgate is opened and closed by means of a hydraulic system, consisting of a hydraulic pump and two hydraulic cylinders. The hydraulic system is controlled by the boot lid/tailgate module.
In addition to the hydraulic system, an automatic soft-close facility (fitted as standard on E38) and an electrical rear lid release (fitted as standard on E39) are also fitted on the rear lid. These components are controlled by the general module of the ZKE III.
The general module and boot lid/tailgate module are interlinked via the K-bus.

Boot lid opening procedure
Release button is pressed.
The ZKE III general module receives the instruction to open the boot lid/tailgate. It activates the drive for the automatic soft-close facility and the drive for the rear lid release. The rotary latch of the boot lid/tailgate is opened and the lock striker is turned upward.
The rear lid contact signals "boot lid/tailgate open" to the general module. This signal is routed via the K-bus to the boot lid/tailgate module.
The boot lid/tailgate module powers the hydraulic valve and the hydraulic pump. The boot lid/tailgate is opened by means of the hydraulic cylinders.
With the aid of a tilt switch on the boot lid/tailgate, the boot lid/tailgate module detects when the boot lid/tailgate is fully open and switches off the hydraulic pump after an afterrunning time of approx. 1 second.

Boot lid closing procedure
Release button is pressed.
The boot lid/tailgate module powers the hydraulic valve and the hydraulic pump. The boot lid/tailgate is closed by means of the hydraulic cylinders.
When the boot lid/tailgate is closed the boot lid/tailgate contact signals "boot lid/tailgate closed" to the central body electronics control module in the ZKE III. Its signal is routed via the K-bus to the boot lid/tailgate module. The hydraulic pump is switched off.
The general module activates the drive for the automatic soft-close facility. The lock striker of the boot lid/tailgate is turned down thus pulling the rear lid closed.

Operating buttons

The boot lid/tailgate opening and closing functions are operated by means of three pushbuttons.
Operating button for boot lid/tailgate closing cylinder
The boot lid/tailgate can be opened and closed by pressing the lock cylinder in the boot lid/tailgate.
The pushbutton is connected both to the boot lid/tailgate module as well as to the general module in the ZKE III.
Operating button for boot lid/tailgate, inside
The boot lid/tailgate can be opened and closed by pressing this pushbutton.
The button is only connected to the boot lid/tailgate module. A closed boot lid/tailgate cannot be opened by means of this button as the signal from this button is not sent to the general module in the ZKE III, consequently the rotary latch is not released.
Operating button, vehicle interior
The boot lid/tailgate can be released and opened by pressing this button (located in A-pillar on driver's side). The boot lid/tailgate cannot be closed with this button.
The pushbutton is only connected to the general module in the ZKE III. Its signal is routed via the K-bus to the boot lid/tailgate module.
All operating buttons switch to ground.
If the buttons are struck briefly the boot lid/tailgate is fully opened (all pushbuttons) or closed (only buttons in boot lid/tailgate).
If the boot lid/tailgate is moving, it is stopped when a button is pressed once more.

Radio remote control

The boot lid/tailgate can also be opened and closed by means of the radio remote control.
The boot lid/tailgate is opened by pressing the key button with the boot lid/tailgate symbol. If the boot lid/tailgate is moving, it is stopped when a button is pressed once more.
The button on the key-chain transmitter must be pressed and held in order to close the boot lid/tailgate.

Tilt switches

A tilt switch is fitted in the boot lid/tailgate in order to detect its position. The switch is active when the tailgate has reached the upper stop (tailgate open). The tailgate module then switches off the hydraulic pump after an afterrunning period of 1 second.


Hydraulic system

Components

The hydraulic system consists of the following components:
Hydraulic unit
contains the hydraulic pump and the pressure relief valves
Hydraulic lines
Connections between the hydraulic unit and hydraulic cylinders
Hydraulic cylinders
Mounted on left and right of boot lid/tailgate
The system is operated with a maximum pressure of 100 bar.
The hydraulic system is maintenance-free and self-venting.
Note
The procedures described in the repair instructions must be followed when working on the hydraulic system.

Hydraulic pump

The hydraulic pump is controlled by the boot lid/tailgate module in the directions of rotation "open boot lid/tailgate" and "close boot lid/tailgate".
Power is supplied by means of two relays integrated in the boot lid/tailgate module.
A repeat lock facility prevents the hydraulic pump overheating. The pump is switched off for approx. 6 minutes if it was in operation for longer than 2 minutes within a short space of time.

Pressure relief valves

The pressure relief valves are integrated in the hydraulic unit and limit the maximum possible pressure in the hydraulic cylinders.
The pressure is limited to maximum 100 bar to open the boot lid/tailgate and to maximum 60 bar to close the boot lid/tailgate.

Emergency mode

In the event of system failure, the boot lid/tailgate can be opened and closed manually by exerting little pressure.
An emergency valve is additionally integrated in the hydraulic unit which, in the event of system failure, maintains a system pressure of 40 bar thus ensuring the boot lid/tailgate movement is dampened.

 

[haywire]

The wiring diagram to retrofit the system.

Looks rather complicated and many components to me!

 

[bmw7833]

See..i am looking the right person to help me. Haywire, u are awesome!

 

[seewai]

Wow, can't wait to see the outcome bro Lim, keep us posted!