Boot-Lid Warning-Triangle Holder
Two-piece holder and mounting bracket for storing a reflective warning triangle on the inside of the boot lid. The creator measured and photographed this custom installation on a 1979 300 SD that was built for the US market and therefore did not originally have the bracket; no other model year, body, market or factory-option fitment is inferred. The demonstrated installation uses four plastic rivets plus a roughly #10-24 by 1.5-inch screw, nut and wingnut. Compare the boot-lid pressing and triangle dimensions before printing, use automotive-interior heat-resistant material, keep hardware clear of wiring and the outer skin, and confirm the triangle is retained without obstructing the lid or latch.
Seat-Adjustment Repair Handle
Bolt-on replacement handle for broken manual seat-adjustment levers. The creator explicitly designed and photographed it for both 116-series and 123-series cars, states that it can be used at all four handle positions, and notes that side height adjusters accept one screw while the front adjusters use two. The demonstrated part was printed in PETG, sanded and buffed, then fastened through the surviving metal lever with screws and nuts. Remove only the remains of the failed grip, preserve the original lever, deburr all holes, use secure low-profile hardware, and confirm full adjustment and locking travel before driving.