This is the car you and your daughter are fixing up for her, right? Sounds like things are going pretty well.
Hmm...sounds like maybe one of the electrical contacts in the connectors might have a little oxidation on 'em. I'd go ahead and pull each one out and plug it back in a few times just to exercise the contacts a bit. Also, does the dash clock also show 8-1-1999 as well as the head unit?
In most USA W220's, I'd expect COMAND to sync time up via GPS, if it has the navigation system. In pre-facelift cars, the entire head unit assembly has either two or three modules; the nav unit is the bottom one (the third one). Does yours have the nav module? If so, it'll sync up at startup, though you may need to insert a Navigation Disc to get it to do so.
However, you might want to consider going with an Android device like
and I have done in our S500's. It's very sweet, indeed. Now that we know the wiring and how to sort all that out, it's not at all difficult. Your daughter would love it, since she probably knows Android very well already. And either the head unit can do 4G/Wifi, or alternately her phone can be a WiFi hot-spot, so either way, she can do nav (Waze, Google Maps, whatever) on the car and keep her eyes on the road where they belong!
You have a have an excellent memory! Yes, youíre correct I bought the car for my daughter. Although admittedly, I must say in spite of the age of the car, it just looks, feels and drives so nice, itís going to be difficult handing the keys to a 16 year old, fearing what might happen to it. Hoping and praying for the best!
Anyway...yes, I do have the nav and with the cd inserted. I was initially having trouble with the time which was also incorrect and whenever I tried to change it the system would only let me adjust the minutes. The date and the hour were greyed out preventing me from making any changes. I read up on this forum and determined that I needed to turn off the ignition, wait a few minutes, then try again immediately after turning on to ignition. I read that you must do this before the satellite syncs up with the car. Well...that worked. The car is adjusted for Pacific time with DST and is now keeping perfect time. Last night when going to bed I thought that I had solved both the date and the time issue. I was saddened to realize this morning when I got up to take the kids to school that only the clock is keeping time and as far as Command is concerned, today is 8-1-1999.
As to your other question, the dash clock mirrors the time in the head unit so they appear to be in sync. My dash clock only displays the time however, not the date. I assume you made a typo and Ďtimeí is what you were meaning?
Insomuch as the Android units go, I must confess Iím curious about them. My only reluctance would be having to ditch the fiber optic and pull new cable, install a new amplifier and possibly lose some of the functionality like the dash clock and steering wheel controls. Iím arriving a bit late to the W220 party, so Iím sure you guys have probably figured out solutions to just about everything.
I donít dislike my Command system, yes, itís very outdated but to be honest, Iíd be content if I could just get the date to remain set and install some kind of Bluetooth kit. That would be all I need. Donít laugh, but I actually see the Navi in the car. Still works. Admittedly, it is about as sophisticated as the original arcade game Pong, but it works!!
If there was a way to retain my factory amplifier and fiber optic setup, Iíd be inclined to upgrade to a newer Command system like on the later year W220ís. I know Mbz ditched fiber optic at some point so some units are not compatible, Iím just not knowledge enough to know what years will work and what wonít.
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