Hi,
How often has the transmission oil been changed or had service intervals in that 257,000 miles?
I’m thinking with that many miles that is possible that the clutch plates are going bad and possibly are peeling trash into the shifting mechanisms.
This is only a mechanical point of view, of course, as I know nothing about all the AWD vehicles.
I have only 240s.
Electronic sensing and controls are a big factor at this point, especially, if it’s giving a blinking light.
The computer brains are saying “ we are operating out of operational perimeters.”
Engine are RPMS not matching the vehicles speed is one for sure.
The computers in these cars are like having a spouse telling you something is not righteous, but they don’t make it personal. (:-)
Phil
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