change time on c 280 2006
http://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/ownersmanual/2006_c230_c280_c350_c230c350sport_c280c3504matic.pdf Page 145 You must first go to sub-'menu and then + or - you really should read it in that link, too long for me to write out or even copy
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