I've hired cars from varied companies so thought I'd compile a list of what comes with each and fuel policy.
I've never booked direct with them and lately I have been using Doyouspain as the broker. Mimum stay one week, normally stay 2 weeks, 3 weeks max.
Centauro - one jacket in car and triangles in boot. Operate full/full fuel policy and no pressure to buy top up insurance for tyres, windows, keys etc.
Auriga (Crown) - one jacket and triangles and told full/full but on return found I could returned if I'd filled up tank.
Europa (Gold) - no jacket didn't look for triangles so they could have been in boot. 16e for extra insurance and return car empty.
Before this I used Record (booked using the Emailcarhire their budget booking site) - no jacket or triangles, heavy daily charge for extra insurance but if you refuse it they normally reduce this to 1.50 a day maximum payment is 21e. Fuel policy no payment up front and you bring it back with the same amount. Check the fuel guage before you leave garage as it might be less than they state on rental agreement.
I used them for a couple of years but made the mistake of booking a KA, when collecting car (picanto) I found it didn't have a facia on the stereo system. For this I had to pay a deposit of 300e. This was the last time I used them.
All cars from Alicante as I rarely use San Javier.