Hi just followed Humingbirds recomendation.
My chassis plate contains the following:
2580 kg
5160 kg
1 1160 kg
2 1450 kg
So am I right in thinking:
1 1160 is front axle max load
2 1450 is rear axle max load
The 2580 is the maximum Gross weight of vehicle ie with passengers luggage etc
5160 kg is then max allowed mass all up weight of everything.
So if vehicle is loaded to max, then trailer can only be 5160-2580 =2580 kg
However if it is only the driver, say 100kg then Gross vehicle weight will be close on 2000kg, thus trailer could be 5160-2000 = 3160kg
However you have to take into consideration the tow bar design limits, which is probably where the 2700 kg comes from.
Each vehicle could be different so check the plate.
I hope this is right and helps other.. if not I will edit it ..
best regards, Rustic