Here is the info I collected from the shop manual. Applies to MY2006 through 2009 only.
1. No info on drain plugs (magnetic or not), since the shop manual doesn't specifically state so I assume they are non-magnetic? They should be the same front and rear, but see the note on differential numbers and different styles of plugs used below.
2. Front diff lubricant and capacity: Castrol SAF-XO 75W/90, 0.61 liters (0.64 US Quarts) *
3. Rear diff lubricant and capacity: OPEN DIFFERENTIAL: Castrol SAF-XO 75W/90 (same as front diff), 1.1 liters (1.16 Qts.) *
4. Rear diff lubricant and capacity: LOCKING ELECTRONIC DIFFERENTIAL: Castrol SAF Carbon Mod Plus, 1.5 liters (1.60 Qts.) *
* Manual states these are dry capacities and slightly less may be needed when refilling due to some residual oil retained in the pinion housing. See point 8 below and good luck with that estimate... Suggesting you carefully measure the quantity of drained fluid before you discard it, and refill with the exact same quantity of fresh lubricant.
5. Torque for front differential drain plug:
CAUTION: There have been 2 different types of fixings used for the drain plug. Note the type and differential serial number, and make sure the correct torque is applied:
Up to differential serial number 254845: Tighten the hexagonal drive drain plug to 54 Nm (40 lb.ft).
From differential serial number 254846: Tighten the 3/8'' square drive drain plug to 28 Nm (21 lb.ft).
6. Torque for rear differential drain plug:
CAUTION: There have been 2 different types of fixings used for the drain plug. Note the type and make sure the correct torque is applied:
Up to differential serial number 254325: Tighten the hexagonal drive drain plug to 54 Nm (40 lb.ft).
From differential serial number 254326: Tighten the 3/8'' square drive drain plug to 28 Nm (21 lb.ft).
7. Torque for filler plug (both front and rear diff): 34 Nm (25 lb.ft).
8. CAUTION: Do not fill either front or rear differential with lubricant up to the filler plug. The filler plug is only used to fill the differential with lubricant, and not to act as a level indicator.
The only way to check the fluid level in the differential is to drain all the fluid out and refill with the correct quantity, shown in the above specs.
9. Wash your hands thoroughly. J/K.
Front diff filler and drain plug locations:
Rear diff filler and drain plug locations:
How to tell an open vs locking rear diff... Slide under the car and look for the actuator on the differential case, should be easy to spot:
A - Electronic rear differential
B - Open rear differential
1 - Rear driveshaft
2 - Electronic rear differential
3 - RH rear drive halfshaft
4 - Actuator (locking) motor assembly
5 - LH rear drive halfshaft
6 - Rear differential