The present invention relates to a headlight adjusting device with a test probe, an image of the tested headlight on a monitor be straightened lens, with a data storage of the difference in height between the contact surface of a on the side of the headlight and rear wheel of which in each case arranged in the support surface of the corresponding front wheel or a value corresponding to this difference in height and with a the respective difference in height and / or value be taken into account for correcting the position of the image on the monitor, as a result of which the effect of the difference in height on the evaluation of the respective adjustment of the respective headlight can be compensated for. The present invention also relates to a headlight adjusting space a headlight adjusting device, as well as about a method for testing a.
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