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Re: (Shomegrown)

335d has two tanks for the def, one passive and one active, the active is the smaller tank and the passive is larger tank. The active tank where the def fluid that get pump into the exhaust. The kruse bottle only fills the active tank.
BMW maintence only covers items when they are a schedule due. Since this is no scheduled service, he had to pay for it. But since it such a low mileage since you topped it off maybe you might have a faulty sensor in the active or passive tank and throwing the system off. Your driving profile also affects the def fluid
 
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