I generally check the oil level in my w220 s430 each week or so. I use the dash readout most of the time. It will say oil level OK, Low, or high. I scrolled down to the check oil function today and it simply says "Perf. Serv. on Time." The FSS shows 6100 miles till the next A service is due. Dipstick is a little north of the middle which should be OK, right? Why the change in message?

Thanks

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Best Regards,
Sam

'76 280 Time Capsule
'00 S430 Long Trips
'91 190E Seeing how far it will go. 366k
'04 American Eagle Motorcoach