280 SLC Coupe R107 06/1976 - 09/1981 M110.982,986. 280 E W123 02/1976 - 11/1985 M110.98. 280 CE Coupe C123 03/1977 - 11/1985 M110.984,988. This is probably because of modern fuel additives & the introduction of ethanol into fuel.
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