It should have both. Standing in front of the car the coolant temperature is in the thermostat housing at the front of the engine. It should have a single green wire attached. The thermo time switch is to the right in the intake manifold very close to the front of the engine. It has 2 wires but I don't remember the colors.
I could be wrong on some of this as it is a EURO car.
Are you having a problem that we may help you with? These two sensors are not related except they monitor coolant temp for 2 different systems. One the gauge and the other for the cold start injector.

Paul

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84 500 SEL (307,xxx miles)