I do not have the owner's manual and need to know how to fill the ATF resorvoir.

The automatic transmission fluid fill location on a 2008 BMW 650i can vary depending on the specific model and transmission type, but generally it is located under the hood and accessed through a dipstick tube.

To locate the dipstick tube for the automatic transmission fluid, follow these steps:

1. Open the hood of the vehicle and locate the transmission fluid dipstick. The dipstick handle is usually yellow, red, or black and is labeled with "ATF" or "trans."
2. Remove the dipstick from the tube and wipe it clean with a lint-free cloth or paper towel.
3. Reinsert the dipstick all the way back into the tube and then remove it again. The fluid level on the dipstick should indicate the current level of transmission fluid.
4. If the fluid level is low, you will need to add automatic transmission fluid. To add fluid, remove the dipstick and use a funnel to pour the fluid into the dipstick tube. Be sure to use the correct type of transmission fluid specified in your owner's manual.
5. Check the fluid level again with the dipstick to make sure it is at the correct level. Add more fluid as needed.

Note: It is important to follow the recommended procedure for checking and adding transmission fluid to your BMW 650i to avoid overfilling the system, which can cause damage to the transmission. If you are unsure about the location of the dipstick or how to properly add fluid, consult your owner's manual or a qualified mechanic for assistance.

The obvious answer to that would be to look in your Owner's Manual.
If you do not have an Owner's Manual, you can get one at:
http://www.jeep.com/en/owners/manuals/

The service manual lists two types depending on which engine your vehicle is equipped with:

4.0L Engine requires ATF Plus 3 or ATF Plus 3 Type 7176
4.7L Engine requires ATF Plus 4 or ATF Plus 4 Type 9602

on the drives side of your trans should be a plug like 7/8 not on the bottom but on the side pull plug out my truck uses ATF stick finger in hole to see if you use ATF if so fill till fliud leeks out then relplug check owners manual for rite fliud

The owners manual says nothing about ATF change intervals. The warranty manual says check it regularly. In the severe service section of the warranty manual it says for severe duty change it at 30,000 miles(48,000 kilometers). I would consider changing the ATF no later than 50,000 miles(80,000 kilometers). Mitsubishi cars use there own Diamond ATF SP III. If you do not change it by 60,000 to 70,000 miles (96,000 to 113,000 kilometers) the transmission may start to act funny when shifting. Regular changes will keep you from experiencing this problem. Be sure to use genuine Mitsubishi Diamond ATF SP III or a synthetic equivalent.

Your owner's manual lists the correct fluid. Sometimes it is listed on the P/S fill cap. If you remove all the fluid then use ATF+4 fluid. If you are only topping it off then use ATF+3. This is the same fluid that you use in the Automatic Transmission of your Neon.

ATF +4 type 9602 fluid

2001 OLDSMOBILE ALERO 3.4L 6-cyl Engine Code [E]
2001 OLDSMOBILE ALERO 2.4L 4-cyl Engine Code [T]

Automatic Transmission,4T45-E......AF6
Automatic Transmission,4T40-E......AF6
Use Low Viscosity ATF, Hight Viscosity ATF or additives create fluid retention which cause the servos, solenoids to seize up causing shifting problems.

CAPACITIES:
Automatic Transmission, 4T45-E Initial Fill..........6.5 liters
Automatic Transmission, 4T40-E Initial Fill..........6.5 liters
Automatic Transmission, Total Fill
4 speed 4T45-E..........12.2 liters
4 speed 4T40-E..........12.2 liters

Good luck and hope this helps.

Please consult your owners manual for the exact amount of ATF to add.

Many of these have a Electronic Power Steering Assembly. No fluid is required. If you are having a problem with it you have to take it in to your service center, there is nothing you can service at home.

owners manual, dealership parts/ service