Sensor is open or not connected. I see this when I do my power up tests on them when I work on them. On my W201/W124 the sensor is attached to the license plate bracket. There should be an intermediate connection between the sensor and the display unit. I think its somewhere around or in the fuse box.

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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
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(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


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