To be fair to my local Renault garage, they have the cheapest main dealer prices in town.
And they have managed to sort out all of my electrical problems which have stumped even me!
My Wifes Twingo melted the wiring loom somewhere deep behind the dash and was causing all sorts of random faults, they diagnosed it correctly, and cut it all out very quickly indeed.
Renault 4 wiring is a piece of cake in comparison to a modern vehicle, the trouble is modern technicians only plug their computers into a diagnostic socket and find it very difficult to get any further.
My Kia dealer on the other hand was a total waste of space, when I first got my Sedona it was 18 months old so had 6 months manufacturers warranty left on it, so I went through it with a fine toothcomb before the warranty ran out.
On our first trip to France we all felt awful and I realised that we were getting gassed and on opening the bonnet I could see sooty exhaust gases around the top of the intercooler, (which sits directly on top of the engine). When we got home I stripped the intercooler off and the sound insulation to find everything melted where the exhaust gases were escaping from around the fuel injectors. I did a search and found that Kia had issued a technical bulletin showing to put larger washers on the injector bolts and there was a recall for it.
I took photos of the melted mess and then booked the car in for a service and to get the injectors sorted out, they rang me later on and told me the car was ready so I was happy and went out to pick it up, as I walked out to the car with the technician he says "I put your car on the computer and it said there was no leaking" I went off the wall, got my phone out and showed him the photos and said " well my mechanical hands say bloody different, I want the damm thing repaired and repaired properly with all new sound insulation the lot". I said "it took me ten minutes to take the intercooler and sound deadening off, why couldn't you be bothered?" I've never taken the car to them again!