[MP81]

The only time I had ours do that was when the fuel gelled.

Being a diesel, there is no spark timing - so I'd be willing to bet it is fuel related.

At 37k, this should be covered under the powertrain warranty, but obviously getting it there might be a problem, haha.

 

[MP81]

Now that you've fixed it, see if the dealer will replace it under warranty with the new part, since it'll definitely do that again, it sounds like.

 

[MP81]

I honestly wouldn't touch it, lest doing so causes a problem.