04 E53 4.4i tow hitch question.

[Johnny_5]

I've been considering on adding a tow hitch on my X5 but have a few questions. Will my car be ok towing a trailer with a vehicle on it as is or will that be a problem? If I'm not mistaken I thought the X5 with the tow package had additional cooling or something different on them??? Second will a aftermarket kit be ok or is it better to go oem? And if oem where is a place I can buy it from? For the most part it will probably be used for smaller trailers to move things from here to there but would like the ability to tow vehicles as well.

Any insight would be greatly appreciated.