https://www.youtube.com/watch?v=VJUlEZ6AqKA

Hi everyone! I have a problem with my Land Rover Evoque 2015 Automatic diesel. Sometimes when I drive the car I hear a strange electric sound coming from the engine. The same time D blinks for a few seconds and gear box goes to neutral. I have to wait few seconds till it picks a gear so I can resume driving. I took the car to the dealer shop but they didn't notice this problem while they were testing the car but they got some fault codes for the EGR valve. They suggested to replace DPF filter and EGR cooler with a total cost of 4,000 Euro. Obviously, I didn't go with it and I took the car to another car engineer to abolish the EGR of the car. By our surprise, the problem remained and even though I took the car to many car engineers, no one can find the exact cause of the problem and there are no faulty codes on the diagnostic.

Till now, I have tried the following:
Change of battery
Change of transmission oil
Change of filter and engine oil
Abolished EGR

If anyone can give some suggestions, would be highly appreciated.