LAMP SETTING ON A MERCEDES-BENZ W212 (E-CLASS UP TO MODEL YEAR 2016)
Important safety note
The following technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for suitably qualified personnel only.
STEP-BY-STEP INSTRUCTIONS
Vehicle and work preparation
Firstly, the vehicle is prepared: this includes placing it on the properly set up lamp workstation, the connecting of a battery charger and also the visual and functional test.
Correct alignment to vehicle
SEG IV - alignment of the beamsetter to the vehicle
SEG V - alignment of the beamsetter to the vehicle
The beamsetter is then aligned to the vehicle.
Positioning the SEG in alignment to the lamp
SEG IV - positioning the device to each individual light source with the laser pointer
With the SEG IV, the device is optimally positioned to each individual light source with the aid of the laser pointer (for double lamps, repositioning is necessary in each case for low beam/high beam).
Reading the forward inclination
Forward inclination is 1%
The required forward inclination can be seen on the B-pillar of the Mercedes W212. In the example, this is 1%.
Setting the forward inclination
SEG IV - setting the forward inclination via the rotary control knob
On the SEG IV, the forward inclination read in this way is set accordingly using the rotary control knob. With the SEG V, the forward inclination is automatically taken over by the device during vehicle selection.
Initiation of light measurement(s)
SEG IV
SEG V
This is followed by the initiation of the actual light measurement, firstly of the low beam.
Result of low beam measurement
SEG IV - result of the low beam measurement
SEG V - result of low beam measurement
The result of the low beam can be read off the analogue scale on the SEG IV.
With the SEG V, the result is displayed digitally. In the example, the light distribution is OK in each case.
Result of the high beam measurement
SEG IV - result of the high beam measurement
SEG V - result of the high beam measurement
The high beam measurement is then carried out accordingly. The results of the example measurements are also OK in every case.
Deviations from the reference values - two examples
In our example measurements shown above, the results were error-free. But how do results that deviate from the standard value present themselves? Here we provide an overview based on the low beam measurement with the SEG IV.
In the first example, the lamp is set too low and too far to the left. This is shown by the fact that the measurement line runs below the reference line and has a centre offset.
In the second example, the lamp is set too high and too far to the right. The cut-off line runs above the reference line and also has a centre offset.
In both cases, the lamps would have to be readjusted accordingly until the reference specifications are met.
Example 1 - lamps set too low and too far to the left
Example 2 - lamps set too high and too far to the right
Both the SEG IV and the SEG V allow the lux values generated by the lamp to be measured in parallel with the light distribution measurement. In this way, it is possible to reliably assess whether the maximum permissible glare value of the low beam is exceeded and the minimum illuminance of the high beam is reached or the maximum illuminance is exceeded.
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