Hello experts. Here’s a report about which it is worth to meditate. Vehicle is a VW Sharan BMT 170 hp from 2011. Power loss and jerking sporadic. Gradually put off symptoms. Workshop read out several times without finding out. When it was time again directly in workshop without having to take out. 1 week troubleshooting later the diagnosis. Water in tank, dirt in tank. Fuel filter clean but renewed. Diesel sample Yellowish, foamy, with black particles. Marder damage Kraf fuel return line. Cost point of the invoice 850 € without further results. What do you say about it? I find this somewhat questionable. Bad diesel can definitely be excluded. And diesel stains under the car also (garage car). Fuel is the same tank for all cars. My guess is paraffine after service life or in the tank something dissolves!?