Literally the biggest eff ups I've ever experienced when trying to maintain a car were at dealerships.
Brand new Honda Prelude: Opps, sorry we forgot to refill the oil.
Brand New Fully Loaded Nissan Maxima: Sorry we had a recall on air bags and then didn't put the steering wheel back on right.
Brand New Ford Explorer (V8 and loaded): Sorry we messed up your AWD and traction control.
Brand New Honda Pilot: Sorry we messed up your TPMS
Brand New Volvo C70 Convertible: Opps, sorry we messed up your roof mechanism