What can cause the emergency brake assist of a vehicle to deactivate automatically?

The correct combination of answers includes the first two choices, which highlight factors that can impair the emergency brake assist system.

1. The functionality of the radar sensor being impeded due to snow means that if the sensors cannot detect obstacles properly, the emergency braking system may deactivate, as it relies on accurate readings to function effectively.

2. A shift in the position of the sensors due to collision damage can also lead to inaccurate data being relayed to the vehicle’s braking system, which can deactivate the emergency brake assist for safety reasons.

Understanding these points is crucial because they emphasize the importance of keeping vehicle sensors in proper working order. Should any of these conditions occur, the vehicle may not perform optimally when it comes to emergency braking, which is vital for road safety as mandated by German traffic regulations.

The third option regarding adaptive cruise control does not relate to the deactivation of the emergency brake assist because the systems function independently under normal circumstances. Therefore, it's essential to recognize all relevant factors to ensure comprehensive knowledge of vehicle safety systems.