The issue occurs when drivers turn on the high beam function using a manual stalk on the steering column, once activated; the high beams can no longer be turned off in the same manner with the stalk.
Mercedes-Benz has said that the high beams can only be switched off by turning the rotary light switch which controls all headlights on the car.
The concern is that drivers may not realise their high beams have stayed on, and could potentially dazzle the vision of other oncoming drivers.
MY2019 A-Class vehicles are affected, with the German manufacturer calling out 597 vehicles to be repaired.
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Affected owners are urged to contact their local Mercedes-Benz dealership for a free software update to rectify the issue.
Find a full list of affected VIN numbers here.