Setting the date and time - W221 / C216

[steve.link]

Botus - worked perfectly first time! Really happy - thank you

 

[Botus]

that's great news -

can you post the photo of the eng menu in the right place - saying 423

 

[steve.link]

Botus - yes of course - I will have a look tomorrow. Once it worked I didn't check anything!

 

[Botus]

awesome USA guy reports it worked for him too.

so thats both the comand units that failed to update sorted. Shame Mercedes Benz don't know how to programme their own cars !!!!

mind you they don't even know the Part number from the MB number so is it any surprise,

European ZB Part number 2218703591 - Actually MB 221 870 0392

USA ZB Part number 221873891 - Actually MB 221 870 0692

 

[steve.link]

Botus - photos of Comand screen attached

 

[Botus]

FYI for super sharp eye'd people... the ENG menu on both "unsupported part numbers" that recently got updated (one unit in the USA and Steve's here) whilst showing the date correctly in the user menus, both had in the ENG menu's an interesting "change"

look above bottom right photo, it says Date, time Tue ???
this was the same on the USA unit that (had when he did the photo) Date, time Mon ???
I was a little worried as last time I looked at mine in April I remembered it had said Date, time: Sat Apr

So just went and checked mine today (which was updated using the official Merc release Disc) it shows I too get Date, time ??? (bottom photo)
So I'm guessing if the car has been awake long enough this bit updates, or maybe outside daylight saving its muddled the month in this view???.



some associated garbage ( SV = Space Vehicle )

The satellites broadcast two types of data, Almanac and
Ephemeris. Almanac data is course orbital parameters for all
SVs. Each SV broadcasts Almanac data for ALL SVs. This Almanac
data is not very precise and is considered valid for up to
several months. Ephemeris data by comparison is very precise
orbital and clock correction for each SV and is necessary for
precise positioning. EACH SV broadcasts ONLY its own Ephemeris
data. This data is only considered valid for about 30 minutes.
The Ephemeris data is broadcast by each SV every 30 seconds.

When the GPS is initially turned on after being off for more than
30 minutes, it "looks" for SVs based on where it is based on the
almanac and current time. With this information, appropriate
SVs can be selected for initial search.

When the GPS receiver initially locks onto a SV, the Garmin
display then shows "hollow" signal strength bars. At this time,
the Ephemeris data has yet to be completely collected. Once the
ephemeris data is collected from EACH SV in turn, the associated
signal strength bar will turn "solid" black and then the data
from that SV is considered valid for navigation.

If power is cycled on a GPS unit, and when turned back on, the
Ephemeris data is less than 30 minutes old, lock-on will be very
quick since the GPS does not have to collect new Ephemeris data.
This is called a "warm" start.

If it is later than 30 minutes, this is considered a "cold"
start and all Ephemeris data will have to be recollected.

If the GPS has moved more than a few hundred miles or accurate
time is lost, the Almanac data will be invalid and if you are
far enough off, none of the SVs that the Almanac thinks should
be overhead will be there. In such case, the GPS will have to
"sky search" or be reinitialized so it can download a new Almanac
and start over.

 

[steve.link]

Hi Botus,

I took 2 photos of my comand screen and they are both the same. First one taken after about an hours drive and the second one immediately on start up after car had been standing for about 4 hours

 

[Botus]

thanks for looking, strange isn't it?

But as I said mine does it too... mine has flipped over for UK daylight saving correctly every time since originally applying the patch 16 Nov 2019

I see your almanac flipped on the right photo, to the one I got yesterday, the stuff in my post attempts to explain what it is but not too sure....

 

[steve.link]

Botus - mine is set with tick on daylight saving so will have to wait until March to see what happens but I think it will be OK. Had this car for 4 years now and I am looking for a W222 so maybe I will never know