Carlos does not want to listen to customers because they kniw nothing.
I visited Carlos with my motorhome when my heater/boiler had a malfunctioning gas-solenoid.
A fault easily recognized because the solenoid makes a very loud and distinctive noise 30 seconds after start-up. It was also indicated by the red diagnostic light.
But Carlos did not want to listen to the customer because (his words) he followed a procedure. He had done this a thousand times. And, he pointed out, if anything goes wrong he bears full responsibility.
So they started blowing compressed air into the chimney. Thus blowing all the dirt into the boiler/heater instead of disconnecting the chimney and blow out. In my humble opinion not the best idea.
After that, and some other disassembling, they wanted to take the entire machine out, which meant removing part of the kitchen.
On my remark that it might be better to first check the gas-solenoid and the electic board, both in plain view, and then (after pinpointing the culprit) check whether these parts are available, before tearing half a motorhome apart, he basically told me I did not know what I was talking about.
That was the moment for me to end our visit to Dark Custom Garage.
On the plus side, Carlos did not ask us to pay for the 3 hours wasted time.
On the down side, after putting all back together again the boiler/heater was now completely dead. Not even a fault diagnostic light anymore, leaving us with an almost unsolvable puzzle.
Naturally Carlos denied any responsibility (the same responsibility he expressed so clearly only 2 hours earlier) about this and even claimed the boiler was not doing anything when we came in. Sadly a blatant lie as I demonstrated in detail what happened at startup of the boiler/heater when we arrived.
I am sure they build very nice campers at Dark Custom Garage, but repairing is clearly not their strong point.