Yup LCD Black Death syndrome.

Time to hit the wrecking yards.

Note that there are 2 versions of the display, a 4-pin, which you probably have in your 1987, and a 5-pin, from 88? and up. If you get a 5-pin be sure to grab the harness connector too. There are several posts out there, including one I did on how to convert it.

http://www.peachparts.com/shopforum/diesel-discussion/348549-outside-temperature-display-question.html

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech