A combustion engine has in the exhaust gas area a SCR-catalyzer with a NH3-filling level, a metering device for supplying the SCR-catalyzer with reactant for reducing nitrous gases, and a downstream NH3-sensitive NOx-sensor. The capacitor includes at least two metal layers which are separated by the glass layer. It also correlating the received search argument to a particular advertisement in a second database having advertisement related information. The second member receives the cable inserted thereinto and is engaged with the first member, thereby accommodating the circuit board in cooperation with the first member.