Sophisticated thermal management system with heat pump as standard
With automatic climate control as standard, the EQA offers the same high level of climate comfort as every Mercedes-Benz. For this it features a sophisticated thermal management system with a heat pump as standard. With its numerous innovative details, such as the reuse of the waste heat from the electric drive system, the system is configured for exceptional efficiency and thus maximum range. Pre-entry climate control also ensures that EQA drivers have no need to scrape the windscreen in the morning, nor to get into a freezing cold vehicle. And even in hot summer temperatures, the interior is cooled to a pleasant level before starting a journey.
It is possible to set the pre-entry climate control for the interior of the EQA before starting. This function is controlled directly via MBUX or via the Mercedes me App. Making use of pre-entry climate control during the charging process helps to preserve range, since the energy requirement is supplied through the charging current and does not impinge on the range.
Pre-entry climate control uses target values as a basis. This means that when the driver inputs a departure time, the EQA is climatised to the set temperature by that time. The driver can do this either individually for each journey and every stretch of the journey, or with the help of a weekly profile. Pre-entry climate control is also activated automatically for five minutes as soon as the vehicle is unlocked using the key. When pre-entry climate control, which can run for a maximum of one hour, starts or comes to an end, the driver receives a corresponding push notification.
In ECO mode the system will also switch to an intelligent operating strategy for the ancillary consumers. This reduces the power requirement, thereby increasing the range to suit the particular situation.
Efficient thermal architecture reduces energy requirement
The EQA features a sophisticated thermal architecture that includes a heat pump as standard. The system operates very efficiently: the waste heat from the electric drive system (inverter and electric motor) can be used to heat the interior. This reduces drastically the draw on battery power for the heating system, thus increasing the range.
A heat pump – a familiar concept from domestic heating systems – transports the warmth from a low to a higher temperature level. This means that "cold thermal energy", which occurs particularly frequently in electric vehicles, can be used to heat the interior. How the heat pump in the EQA works, at a glance:
- Efficient reheating with air recirculation: a high proportion of recirculated air means that less (fresh) air has to be heated. To reduce the tendency for the windows to mist up, the vehicle cools the recirculating air, thereby removing moisture. The heat extracted is fed back into the interior via the water-cooled condenser and the heat exchanger. In other words, the heat is recycled.
- Use of waste heat from the electric powertrain: see above.
- Use of waste heat from the high-voltage battery: if the temperature of the battery rises above a defined threshold value, the waste heat can be used to heat the interior.
 Temperatures just a few degrees above zero which are not perceived as warm.