The Bilstein 18-002461 is a front, 22mm monotube steering damper listed for the 1975 Mercedes-Benz 230 base. That car belongs to the W114/W115 family, and W115 models featured four-cylinder engines and were marketed as the 200, 220, 230.4, and 240, so this part serves the four-cylinder 230 line. Buyers searching for a 1975 230 front steering damper, a W115 monotube replacement, or part number 18-002461 are looking for this exact application.
A worn damper is easy to overlook, yet it absorbs the jolts that rough pavement sends up through the steering wheel. Sloppy steering and poor feedback, especially over potholes, are the symptoms forum members point to. Owners on user forums who swapped in a new unit say the steering feels more direct and less floaty. Set expectations accordingly: it won't heal a worn out steering box or other steering components, but it does make a difference.
Owners on user forums describe loose, unsettled steering over potholes as the main warning sign. A leak is another one: one owner noticed oil dripping from one end of the unit and found it had failed.
Owners on user forums describe it as sitting under the car between the front wheels, running parallel to the front axle, so the job is done from underneath.
Forum guides recommend new self-locking nuts, or reusing the old nuts with blue threadlock. At least one owner on a user forum reports installing the damper without threadlock and had no issues reported in that thread.
Owners on user forums describe this as a short, two-bolt job that takes about ten minutes with basic hand tools. Forum step-by-step guides call for a 17 mm wrench and socket, a breaker bar, and penetrating oil soaked into the bolts overnight, since the hardware is often seized. Clearance is tight, so a ratchet may not fit and a thin open-end wrench can be necessary. Owners also recommend a heavy washer on each side of the bushing at both ends, because the factory diagram shows only one. Plan to replace the self-locking nuts with new ones.