Question about 2006 Mercedes-Benz Mercedes Benz CLS500
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Full Intensity Mode: This mode is used by features that require full low beam headlamp intensity such as low beam headlamp operation in manual or auto modes (nominal: 100% duty cycle).
Off Mode: This is the default mode of the system that will occur when none of the features described above are active. The BCM will deactivate its PWM output (0% duty cycle) during this mode.
The normal battery voltage input to the HDM must be between 6 and 16 volts DC to operate. Any deviation to these values could cause improper operation.
The ambient light sensor is a light sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes to the outside (ambient) light level.
You should have the modules scanned for codes first off. Not the engine control module .( BCM ) body control module , yes . That's the first thing I always do !
Could be a bad ambient light sensor or the headlamp driver module. You could check voltage at the battery with engine running, should be over 14 volts. If you don't deal with this sort of thing on a regular basis I'd take it to someone who does !
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