Where is the 05 Audi a4 heating box?

In the engine compartment, on the left side of the engine.

The specific operation steps for finding the Audi A4L water tank are as follows: open the driver's door of Audi A4L, pull the hood switch on the left side of the driver's leg of Audi A4L, lift the hood of Audi A4L upward, and support the hood of Audi A4L with a support rod. In order to ensure firm support and avoid danger during operation, the Audi A4L water tank is located under the hood inside the engine compartment, on the left side of the engine.

The warm air box is specially used for warm air, which is blown into the compartment by a fan by using the cooling water temperature of the automobile engine. So when driving in winter, you can't blow out warm air. Now car air conditioners can only cool. Heating depends on engine cooling water, namely warm air, which not only reduces the cost, but also simplifies the structure.