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Brand New Mercedes S350d AMG with "AdBlue Fault"

Updated: Jun 30, 2018

Today, we took delivery of our brand new car Mercedes S350d AMG. It was exiting to drive a new car until we encounter one problem. After we have been driving around for a while, we got following message with an engine light:

It says "AdBlue system fault Perf. reduced in 797 km". Apparently something is wrong with its AdBlue system, and if we don't take care of it soon, performance will be reduced in 797 km. What a great start for brand new car on very first day of delivery. However, while I was driving it, I didn't actually notice anything wrong with the car. Hopefully, this is just a minor glitch. Anyway, I'm taking it to the dealer tomorrow morning.

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