You're in the wrong place here. Go to the W210 E-Class forum where the owners hang out.
Your IR DAS control module (N54/1) is a rectangular box that is located behind the Instrument Cluster. The IC can be pulled out using a couple of bent rods that you can make yourself from a wire coathanger.
If your steering wheel is adjustable, and you pull it up to the maximum, it is possible to get the cluster past the wheel. Otherwise you will have to get the steering wheel off first
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