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<blockquote data-quote="bimmerholic" data-source="post: 581921" data-attributes="member: 16686"><p>Even the E39 tail lights does this. Since E39 tail light has the CELIS LEDs....should it blow out due to mismatch of voltage or overcurent, the brake light (at the side where the CELIS is blown) will switch on dimly and it will throw a code.</p><p></p><p>Since the CELIS is the only driving light that is turned on at night, if it blows it will be completely dark on that side of the car. Hence the reason why the brake light on that side will turn on dimly to notify rear cars at night.</p><p></p><p>However, when the brakes are pressed, this brake light will light up at the normal brightness (just like on the other working tail light).</p><p></p><p>BMW Engineers have well thought out contingency plans. Kudos. :top:</p></blockquote><p></p>
[QUOTE="bimmerholic, post: 581921, member: 16686"] Even the E39 tail lights does this. Since E39 tail light has the CELIS LEDs....should it blow out due to mismatch of voltage or overcurent, the brake light (at the side where the CELIS is blown) will switch on dimly and it will throw a code. Since the CELIS is the only driving light that is turned on at night, if it blows it will be completely dark on that side of the car. Hence the reason why the brake light on that side will turn on dimly to notify rear cars at night. However, when the brakes are pressed, this brake light will light up at the normal brightness (just like on the other working tail light). BMW Engineers have well thought out contingency plans. Kudos. :top: [/QUOTE]
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