Earlier quoted context omitted.
Mercedes is actually known for their engine longevity, reliability and serviceability. Yes they have more issues with technology than other cars, but that's because they use more and newer technology than cheaper brands. [1] [1] https://www.osv.ltd.uk/are-mercedes-benz-reliable/
I would find this more compelling if i hadn't had a Mercedes written off because of their "smart" technology choices. Apparently with their vehicles (in this case a C180/2004) the tensioner is power-dependent and requires the vehicle to be used somewhat frequently to work at all. This means that simply by not using the car for 4-5 months, my dad returning to it and turning it on for I don't have much automotive exper…
if your dad regularly lets a car sit for five months without driving it, he's going to have a lot of car troubles. ought to at least take it out a couple times a month, just for 20-30 minutes (ie, long enough to get fully warmed up).