Under the hood (driver's side): Circuit #3 ("PWR") is for the front outlets, Circuit #40 ("AUX") is for the rear.
The 2008 Suzuki SX4 is 5 ft. 8.1 in. (68.1 in.)12V front power outlet(s) wide.
The 2008 Suzuki SX4 has 39.6 in. of front head room.
The 2008 Suzuki SX4 has 41.4 in. of front leg room.
The 2008 Suzuki SX4 has 51.0 in. of front hip room.
The 2008 Suzuki SX4 has 53.3 in. of front shoulder room.
The front track of the 2008 Suzuki SX4 is 4 ft. 11.1 in. (59.1 in.).
This answer is for the 2008 XL7, but it may help: Under the hood (driver's side), there is a fuse panel. In the '08 models, Circuit #3 ("PWR") is for the front outlets, and #40 ("AUX") is for the rear.
The 2008 Suzuki Grand-Vitara has 56.3 in. of front shoulder room.
The 2008 Suzuki Grand-Vitara has 41.3 in. of front leg room.
The 2008 Suzuki Grand-Vitara has 40.0 in. of front head room.
The 2008 Suzuki Grand-Vitara has 55.5 in. of front hip room.
The front track of the 2008 Suzuki Grand-Vitara is 5 ft. 0.6 in. (60.6 in.).