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I may have the answer.
On your 190E, the sockets for the warning indicators are all sort of "plugged in" to the rear of the cluster, they can be put back in out-of-order. If someone along the way had the cluster removed, like to replace bulbs for example, they may have inserted one in the wrong hole. There is a small number tag pasted to the individual bulb harness, near the socket, and a corresponding number on the back of the instrument cluster, this is one way to check it.
Maybe an easier way is to go back to the trunk and remove a bulb, I'd recommend just a taillight bulb. Then start the car and switch on the headlights, look and see if maybe a different warning light comes on (don't complicate things by stepping on the brakes, you just want to confirm proper operation of the bulb failure system).
I've seen this before.
Gilly
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