Hi Ashro,
I'm not very technical so apologies there but I think its not just in Tenerife that the main car dealers make excessive charges. My local Ford dealer charges £60 (75 Euros) per hour for any work and they told me I needed new brake discs, which I couldn't afford to attend to so ran the car for about 3 months before taking to be fixed at a small garage and guess what there is nothing wrong with the brakes!
Any way looks like you are offering good prices so I will bear that in mind when we move over to Tenerife in a couple of years time.
C
