Now, straight up, I don't know if the gearboxes are the same but seeing as the more powerfull 125TDI motor can only be had with a 6spd manual, I have my suspicions that they are very similar to the polo GTI gearbox...

This is from Drive.com.au about the new Tiguan

New VW Tiguan (launch drive models only)

155TSI
Engine: 2.0-litre turbo 4-cyl
Power: 155kW at 5300-6200rpm
Torque: 280Nm at 1700-5200rpm
Transmission: 7-spd dual-clutch auto, AWD
Fuel consumption and emissions: 8.6L/100km and 199g/km
0-100km/h: 7.4 seconds (claimed)

125TDI
Engine: 2.0-litre turbo diesel 4-cyl
Power: 125kW at 4200rpm
Torque: 350Nm at 1750-2500rpm
Transmission: 6-spd manual, AWD
Fuel consumption and emissions: 6.0L/100km and 158g/km
0-100km/h: 8.9 seconds (claimed)

132TSI
Engine: 2.0-litre turbo 4-cyl
Power: 132W at 4500-6200rpm
Torque: 280Nm at 1700-4500rpm
Transmission: 6-spd manual or 7-spd dual-clutch auto
Fuel consumption and emissions: 8.6L/100km and 199g/km
0-100km/h: 7.9 seconds (auto, claimed)

Seems the first admission that the 7spd Dual clutcher can indeed handle more than the supposed limit of 250Nm.... I noticed today also the new A1 Sport has 4 more kilowatts of power over the GTI, yet somehow has exactly the same torque figure.....