I just pulled two instrument clusters from mid 80s 126 models. From all I can tell these are US version cars, definitely not grey market. Both of the outside temperature displays (the one at the bottom center of the cluster) read in Centigrade. My uncle had an '84 300SD and his temperature display read in Fahrenheit. Is there some programming trick, such as temporarily grounding one of the pins or turning the lights on multiple times, which will change the temperture display so that it will read in Fahrenheit?

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Tom Evans
69 280SE 91K (wish I still had it)
73 220D 98K
78 300D 134K
78 300D 185K
81 300SD 301K (still have)
82 300SD 321K (still have)
84 300D 268K
84 6.2 Diesel GMC Suburban 225K (a whole different story!)