Hello, this morning I noticed that the batt. light was very weak (constant) had light on (XENON) and when I turned everything on (fog light, radio, blower at full level, back disk heating (with mirror) seat heating front re+li etc.) it gradually became minimally stronger and when I switched everything off gradually it became weaker. Independent of the motor speed, the whole time did not pay attention because it was a bit brighter in the morning. PS: have still guaranteed on the e box what can this be a lighter or battery or normal???? mfg