Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
It might be helpful for this issue to post a picture of what you are trying to do to the vehicle to give the technician answering your query a better picture of the issue!
Unfortunatly you have failed to provide a picture as requested so it is a little hard to provide you with an answer related to the product you have.
Most steps are bolted on. This will either be from the front which may be covered up by plactic covers to hide the bolt holes or from the rear so you may have to gain access from under the wheel arch.
Without a picture to determine exactly what steps you are replacing it is impossible for me to give you any further information than this.