My 2003 e320 every month or so when the car sits for a week unused, the dash glows red and says battery failure/visit workshop.

I thought maybe it's more defined details in the computer but I can't find anything.

So does "Workshop" mean dealer or repair shop?

If so, I would rather it say repair shop or dealer in this day of computer information details.

THe cars seems fine but I replaced the battery just in case.

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1998 Land Rover Range Rover 66K Miles
1988 300SE Totaled in 1998, hit by drunk driver, but we walked away OK
1989 420SEL 140,000, just warming up. Total by 18 wheel gas truck rear ended, but refused to lose another MB. Had it repaired cost $10,000+ Great Car again SOLD it for a 2003 C320 to save on gas
1991 2500 Suburban 454, 130,000, Best truck in the world. SOLD it out right.
1952 8N Tractor 1,000,000-/+