Shadetree
I had one of my Headlight go in less then 12k miles. I did noticed there was NO grease on them, so I lubed before I plugged them back, None of my tail had any issue yet. On another matter my Hydraulic jack was leaking & had to get it replaced squealing belt replaced and a major job i.e. my rear a/c was leaking bucket full of water, they kept it for 3 days and did fixed it (under Warranty). Hopefully all these issues will get fixed before it runs out of Warranty.

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06 MB E320 CDI 123k miles
14 Sienna (wife's DD) 36k miles
11 GL350 Bluetec 136k (Sold)
96 E300; 292k+ miles (Donated)
11 Sprinter 22K+ miles (Sold)