Have you checked the connector for corrosion or damage to the cable? The tail light is a bulb and the brake light consists of two TEDs Have a look here for more details https://www.newtis.info/tisv2/a/en/e63-650i-cou/repair-manuals/63-lights/63-99-working-time-without-specification-lights/PIwiZ49
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Have you checked the connector for corrosion or damage to the cable? The tail light is a bulb and the brake light consists of two TEDs Have a look here for more details https://www.newtis.info/tisv2/a/en/e63-650i-cou/repair-manuals/63-lights/63-99-working-time-without-specification-lights/PIwiZ49