Hello, I have to tell you my story, and I paid a lot of money for my stupidity. my SLK 200 was re-equipped in a free workshop (small business) with a wedge-belt pulley and pulleys. He had also found out that I needed a new hydraulic pump, the price for the parts would be 1150€ plus 150€ working time so together 130€. The mechanic said the parts are so expensive the servo pump costs 798€ and the set 280€. I was so stupid and had it done because I needed to drive the car to work. It left me no rest and a few days later he had himself an offer of the parts trading where the mechanic had ordered the parts. The price -30% discount was with everything together with 380€. I drove with the offer to the mechanic and confronted him. Then he only told me to send you a bill, I have to say he made it again without a bill because he said it will be much more expensive. Now he sent me a cobbled invoice, with many positions which he could not even give me?