I read the document in TIS and the instruction on the home page, both of them say a special tool called puller is needed to remove the control arm. Do I have to get the tool to remove the control arm? Is there any way to remove the control arm without any special tool? By the way, do I have to do wheel alignment after renew the control arm? What is wheel alignment? Thanks for help!

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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.