Hi all, we have a 2013 SD4 HSE and just got a caravan (about 1.8T fully loaded, so well within towing capacity).

The issue I'm having is that after about 15mins of towing, the car seems to be entering some kind of electronic torque limiting mode.

Temps seem all within limints.
- Engine coolant 85*C
- Tx oil 95*C
- IAT and fuel are both around 40*C
- Locking mode is on
- Torque limiting says 2000Nm (which I understand to be unrestricted)

No codes on dash.
No codes on OBD2 reader.

Park the car up for 15 mins and its perfectly fine again.

In the worst instance, I unhooked the van and the SD4 struggled to get off the line, almost stalling.
TX oil only about 20k kms old.

Any suggestions would be much appreciated thankyou!

Update for this is that the txn oil and fuel filter are both only 20k kms old.