When replacing the front upper control arms you formost need to think about safety. You will need a good quality and large rolling hydraulic floor jack, and a couple good jack stands. You will need to remove the front tire, support the frame on jack stands and be ready to jack up on the front suspension with the wheel off. Do not get under the car while doing this job. Do not attempt it without two jack stands securely supporting the front frame rails when working the front suspension. The video will give you an idea of the other tools you will need. Total run time: 5:09
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PLEASE NOTE: This is NOT a complete step-by-step instruction video. This is a "tip" video which leaves out some basic steps. You need to be familiar with working around cars before you attempt this on your own. Torque values and other specific fastener details are not included. What is included are some tricks that will hlep you get the old control arms out and the new ones back in without wasted time and a lot of frustration.
Here is a comparison between a new and an old upper control arm off a W123 300D:
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