It may be a stupid question - but how the hell do you set the clock in the speedo of a R171 280 SLK? The manual suggests you do it via the menu's - unless you have the command system (as that gets it's time from the GPS). Well - I've got the command system, and that tells me it has the correct time but the clock in the speedo (shown in the image) is now an hour out. The Date & Time option is not listed in the menu's from the steering wheel buttons - so I'm lost. ....or do I have to wait 6 months !