<p>The sump has a protective device extending to a wall (2) of the sump. The device is designed as a flexible, oil-tight protection membrane (4). The membrane covers an inner wall (3) of the sump and is firmly inserted or connected with the sump. The membrane is firmly connected with a seal (5) that is arranged at an upper edge of the sump. A hollow space is formed between the inner wall and the membrane.</p>
