Silverback

I purchased a 2018 Jazz SE a couple of weeks ago and am working througth the comprehensive manual. One problem I have encountered is with the cruise control . Try as I might I cannot get it to work despite the indicator on the multi-information display showing the cruise control logo. the cruise limiter is fine but the cruise control appears not to work. Any help would be appreaciated

I have just purchased a2018 SE Jazz and in the course of going through the various functions om the Multi information display I have inadvertently changed the language from English to German. and can't seem to be able to change it back to English. Any help would be appreciated