Two generations, two kinds of car
An early X6 is a truck-based SUV with a simple electrical system, rugged but now well into old age. An X5 or X7 is a modern crossover with touchscreen infotainment and more standby draw. The advice differs: on the old car we check cables, earth points and the alternator, and on the newer one we fit enough reserve for electronics that stay awake while parked.




