The aerial is one of the most important parts of your radio receiving system. If you cannot get a good signal to the radio, then it has to work with a poor, noisy or weak signal. Using a Hirschmann aerial will give you a great signal that your radio will be able to utilise to the fullest extent it can.
Sometimes an old aerial can no longer be repaired and needs to be replaced. Several prestige vehicles use Hirschmann as original equipment so it makes sense to replace it with a new Hirschmann. At least this way the crucial signal cable will in most cases not have to be cut.
Some aerials have combined functions, this will allow a neater look to your vehicle.