Stabilizer bar links replaced

Hi, i'm looking to buy a used Mercedes C350, 2010 model, Just checked it history and within 8 months of purchase it has had a replaced stabilizer bar link. Hoping that someone would let me know if that is something to worry about.
Also, by the spare tire compartment in the boot, around the edges something looking like a sealant is on there, again, something to be concerned about?


Thanks