Mercedes Stealership? or truthful? or bloating

Hoping someone can post a clear and concise valid picture of the book time for replacing out the command knob (part # 212-870-28-51)
I'm trying to see why (even at $195 an hour) why it took them 2.5 hours to perform - if that is what it shows as true book time.
and also if not too much - the same book time for the belt tensioner replacement too (#272-200-02-07)
I know i can swap these part in less than 30 mins - and that's goofing around...
(While I had this done under my warranty - but i'm getting the close to my limit of liability and feel the dealer is chewing through it -even if I semi got my monies worth)
Thanks in advance!






But heck, this is democracy. You don't like it >>> vote with your feet.
That's what I do and since most of manufacturers still try to put a gun against my head, I registered at https://repair.org/stand-up



https://www.ebay.com/itm/Latest-2019-Mercedes-WIS-ASRA-EPC-Service-Repair-Workshop-Manual-Full-version/223950589741


