[. . . ] With the purchase of a MB QUART car hi-fi loudspeaker set, you have purchased a technically sophisticated, highquality product. [. . . ] Your vehicle may require vehicle-specific MB QUART installation adapters. Take care to protect your loudspeakers from damage and overload during installation and operation. We suggest that you disconnect the negative pole clamp of your car battery during installation to avoid possible short circuits. We also strongly recommend that you never use the loudspeaker chassis as a template for cutting or drilling. [. . . ] Further information and operational possibilities can be found on our web site at www. [. . . ]