I don't think many people here would even consider messing with the programming of this vehicle....not in that way anyhow. Certainly not to increase power/towing. In addition, the engineering of this system is probably not something an aftermarket supplier is going to be familiar with.

The system is setup this way for a reason. It is highly engineered to be the most fuel efficient SUV in the world, while at the same time insuring it will survive the 8yr/100,000mi warranty. "Tweaking" it to increase the torque of the motors or increase the max power draw of the motors would surely shorten their lives. Any such mod would void your warranty and leave you open to huge expenses down the road should anything fail. Better to rent something bigger those few times you need to tow a trailer.

-Tim

2006 Mercury Mariner Hybrid AWD
Black with Pebble interior
Premium Package with Nav & Moonroof



Current ODO: 26,152
Typical Drive: 20 min crosstown in heavy traffic (3.5mi there and back twice a day)


532 Gallons of gas saved
That's 10,642 lbs less CO2 emitted