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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Feb-22-2016, 11:13:42 PM   #11
Obioban
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Default Re: Auto leveling on ZCP?

Quote:
Originally Posted by camberm3 View Post
No, it's not.

Auto leveling only works at startup, which is when it aims your headlights based on passenger and cargo load. Hence the down and up zeroing in procedure you see and hear. However, after that, it does nothing. If you don't carry passengers and/or big loads, it is unnecessary. Many people are under the false impression that the lights adjust while you are driving. They don't.

Test it out for yourself by slowly driving towards a wall through uneven pavement. Then repeat the same identical test with the auto leveling plugs disconnected. Beam hight will be identical for both.
That doesn't test if that's how it functions.

Driving at the same wall twice, once alone, once with a couple hundred pounds in the trunk, with the car on continuously between, would.
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Last edited by Obioban; Mon, Feb-22-2016 at 11:21:33 PM.
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Old Mon, Feb-22-2016, 11:25:36 PM   #12
Obioban
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Default Re: Auto leveling on ZCP?

Here: it updates and resets every 25 seconds. BMW's tech document describing the functionality attached.

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File Type: png Screen Shot 2016-02-22 at 6.24.21 PM.png (489.4 KB, 163 views)
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Last edited by Obioban; Mon, Feb-22-2016 at 11:47:15 PM.
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Old Tue, Feb-23-2016, 01:02:45 AM   #13
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Default Re: Auto leveling on ZCP?

I suspect newer LCMs refresh more frequently or possibly proactively rather than reactively. I know I've gotten them to adjust with hard acceleration and braking. Iirc they may also adjust a bit higher if you're driving 120mph or so
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Old Tue, Feb-23-2016, 01:26:34 AM   #14
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Default Re: Auto leveling on ZCP?

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Originally Posted by terraphantm View Post
I suspect newer LCMs refresh more frequently or possibly poractively rather than reactively. I know I've gotten them to adjust with hard acceleration and braking. Iirc they may also adjust a bit higher if you're driving 120mph or so
Completely agreed-- I've seen them react while driving.

But, the only tech document I could find mentioning the function was from 1998
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Old Tue, Feb-23-2016, 01:55:15 AM   #15
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Default Re: Auto leveling on ZCP?

Yeah, I don't know if BMW ever released notes on how it works with newer cars. NCS Dummy gives some hints though

Code:
                                                  
ANHEBUNG_175_KM/H           00000410 (01)                                         1F                                                                                                                                                                            
    wert_01                     19                                                    19                                                    value 01                                                                                                            E46
    wert_02                     17                                                    17                                                    value 02                                                                                                            
    wert_03                     01                                                    01                                                    value 03                                                                                                            
ABSENKUNG_10_KM/H           00000410 (01)                                         E0                                                                                                                                                                            
    wert_01                     05                                                    A0                                                    value 01                                                                                                            E46
    wert_02                     04                                                    80                                                    value 02                                                                                                            
VMAX_BESCHLEUNIGUNG         00000411 (01)                                         0F                                                    MAXIMUM SPEED ACCELERATING                                                                                              
    wert_01                     09                                                    09                                                    value 01                                                                                                            !LSZ_CI_29,LSZ_CI_29+!(ALLRAD,S54B32),LSZ_CI_29+ALLRAD
    wert_02                     0C                                                    0C                                                    value 02                                                                                                            LSZ_CI_29+S54B32+!CSL,LSZ_CI_29+S54B32+CSL
    wert_03                     0A                                                    0A                                                    value 03                                                                                                            
    wert_04                     09                                                    09                                                    value 04                                                                                                            
VMIN_BESCHLEUNIGUNG         00000411 (01)                                         F0                                                    MINIMUM SPEED ACCELERATING                                                                                              
    wert_01                     08                                                    80                                                    value 01                                                                                                            !LSZ_CI_29,LSZ_CI_29+!(ALLRAD,S54B32),LSZ_CI_29+ALLRAD
    wert_02                     0A                                                    A0                                                    value 02                                                                                                            LSZ_CI_29+S54B32+!CSL,LSZ_CI_29+S54B32+CSL
    wert_03                     09                                                    90                                                    value 03                                                                                                            
    wert_04                     08                                                    80                                                    value 04                                                                                                            
VMAX_BREMSEN                00000412 (01)                                         0F                                                    MAXIMUM SPEED BRAKING                                                                                                   
    wert_01                     08                                                    08                                                    value 01                                                                                                            E46
VMIN_BREMSEN                00000412 (01)                                         F0                                                    MINIMUM SPEED BRAKING                                                                                                   
    wert_01                     04                                                    40                                                    value 01                                                                                                            E46
"ANHEBUNG_175_KM/H" suggests that the lights are raised when driving faster than 175km/h, and "ABSENKUNG_10_KM/H" suggests that the lights are dipped below 10 KM/H. There are also parameters that have to do with acceleration and braking, suggesting the LSZ does respond to acceleration and braking
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Old Tue, Feb-23-2016, 01:57:34 AM   #16
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Default Re: Auto leveling on ZCP?

It does adjust itself not just on cold start. I notice it every time I get into my driveway at night. My driveway has a steep slope that I have to go up just like a speed bump before I actually drive up my driveway. The light would angel down once I started giving gas to get up the slope and then it would go back to straight once the front tires gets on top of the slope. Hard to notice unless you see the sharp cutoff line with an upgraded clear lens or projector.
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Old Tue, Feb-23-2016, 08:15:08 PM   #17
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Default Re: Auto leveling on ZCP?

According to the BMW doc, the lights should point all the way down and then all the way up before leveling out when the key is turned to position two -- Will this always happen? I've never noticed it happen which makes me wonder if my steppers are broken.

Does anyone know if inoperable steppers would throw a code in the LCM?
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Old Tue, Feb-23-2016, 08:36:07 PM   #18
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Default Re: Auto leveling on ZCP?

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Originally Posted by silvergray545 View Post
I don't know that I've ever seen mine do that either. When I owned my E60, the headlights would go up, down and side to side. You couldn't miss it.

Every time I drive behind my buddy, he always tells me how my headlights are way too bright. I wonder if they're stuck pointed up or something.
Is your leveling sensor broken? They're known to break or maybe come loose. The leveling is easily seen while driving at night going over dips in the road, etc. As the front suspension (where the sensor is located) moves up or down so will the sensors mechanism, your headlight auto leveling compensates...or at least that's how I assume it works. I haven't drove my car in months but I don't recall them doing a leveling sequence at start up. Maybe they do it with out the lights on?
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Old Tue, Feb-23-2016, 08:46:08 PM   #19
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Default Re: Auto leveling on ZCP?

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Originally Posted by VNG704 View Post
Is your leveling sensor broken? They're known to break or maybe come loose. The leveling is easily seen while driving at night going over dips in the road, etc. As the front suspension (where the sensor is located) moves up or down so will the sensors mechanism, your headlight auto leveling compensates...or at least that's how I assume it works. I haven't drove my car in months but I don't recall them doing a leveling sequence at start up. Maybe they do it with out the lights on?
I was starting to wonder the same thing too. I'll have to check and see if my sensors are still there and working.
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Old Tue, Feb-23-2016, 09:14:06 PM   #20
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Default Re: Auto leveling on ZCP?

Only my driver side auto levels. Suspecting the passenger side sensor on the control arm is on the fritz. Both of them did it when I bought my car.

('05 non-ZCP)
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Discussing Auto leveling on ZCP? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)