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Discussion Starter · #1 ·
We've just spent a few days touring round Anglesey and Snowdonia. Car's behaved impeccably. 43 mpg getting there and 37+ touring around according to the onboard computer. On thing I'm not happy with are the headlights on dipped beam. They seem to be set too low. Main beam is fine.
 

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Hi Barry, Have you the headlight leveling system on your vehicle. If not you do have the adjusters on the headlamps.

Roger
 

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Discussion Starter · #3 ·
Hi Roger, I've just got standard headlights, no leveling system. The car has a fairly recent mot but the lights are set far too low. Driving on unlit roads is not good. I'll have a look at adjusting them when I get a chance.
Barry
 

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Barry please update your signature via the link below and tick the Show Signature box so we know which model and year you have.
From what I have found is that you should have air suspension which is supposed to keep the car level. Could yours not be doing its job right.

Roger
 

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Discussion Starter · #5 ·
Suspension's working fine. I think part of the problem is that my previous car, Ford smax with the xenon headlights, had the best lights I've ever had. The jags are like 7" sealed beams in comparison.
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Not all vehicles with self levelling suspension have self levelling headlights , my XJ HID's are fixed.

Front suspension always lowers itself before lowering the back end to avoid high level lights,

Rear suspension always rise before the front for the same reason , does it every time I go in to N or Park.

Standard suspension would normally have the manually adjustable 1-4 level adjustment for Halogen / self levelling for HID

The HID Projectors are not the best in the X350 / X358 , very poor in comparison to my Mondeo ST 220

I did even consider that standard halogen headlamps with decent bulbs might be better than the D1S HID projectors.
 

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The self levelling unit was deleted quite early on as the base option of ordinary spring suspension never happened, and the air suspension keeps the car and hence the headlamps level.

There are headlamp adjusters, they are white and stickup through the cover over the radiator and lights at the front of the engine compartment.
 

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That's odd Eddie because cars built with HID's had auto headlight leveling modules inside the headlight unit. The wiring diagrams do not show conventional headlights after 2006.

Roger.
 

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That's odd Eddie because cars built with HID's had auto headlight leveling modules inside the headlight unit. The wiring diagrams do not show conventional headlights after 2006.

Roger.
Any vehicle with HID headlights on normal suspension must be self levelling with self test function.

When you turn them on , they go to the lowest level and then rise up to the correct position.

If they fail to test properly , default position is down to its lowest setting and they'll stay there.

Both of my Mondeo's do this and behave as they should , the XJ is just as is according to air ride height.

Would be interested if anyone else's X350 / X358 does anything different on HID projectors with regards the test cycle.
 

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Every X350 with HIDs I have seen do this Eddie, mine does.
 

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Sorry, I mean they self test on ignition with headlights on.
 

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Sorry, I mean they self test on ignition with headlights on.
I'll be double checking them tomorrow , may not be quite as obvious as the Mondeo , or may be unplugged / not working !

The beam pattern is good / correct level , I checked already when I first thought the lights were poor in comparison to the Mondeo.
 

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SSM17841 dated 28 Oct 2004: HID units without the stepper (levelling) motor were introduced at G39155.

For some reason the wiring diagrams have continued to show the stepper motor without any reference to it not being there on HID cars after G39155.
 

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SSM17841 dated 28 Oct 2004: HID units without the stepper (levelling) motor were introduced at G39155.

For some reason the wiring diagrams have continued to show the stepper motor without any reference to it not being there on HID cars after G39155.
So , Patrick me old fruit , what are we saying here ?

The X350 would have levelling and the X358 would not ?

This info may help me sleep better tonight :)
 

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My 2004 XJR has leveling mechanisms inside the HID lights and used to go to the lowest level and then rise .
When I bought a replacement light the leveling mechanism had been deleted and so I disconnected the mechanism in the original light so it didn’t look odd.
 

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I think the levelling motor was deleted quite early in the X350s production run; that SSM is '04 and the X358 wasn't introduced until ... late '07 or early '08 ? I think it was only about the first year of 350s that had the motor.
 

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there was a whole world of confusion surrounding the Light installation Directive at the time.

The end result was that all vehicles with HiD (gas discharge) lamps required some form of headlamp levelling, which could be either active levelling in the headlamp unit with a motor, OR could be reliant on the vehicle self-levelling suspension where it had it. That "or" bit was added at a relative late date.

So I'm not surprised that early cars had self-levelling lamps with self-levelling suspension and later cars had only self-levelling suspension.

None of them had the internal switch where the user could adjust beam level.
 
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