Called an engineer to repair a faulty grill element on a Bosch oven I had the correct replacement part which the engineer "fitted". When he left and I tried the grill only one part of the element worked and my oven, which was working perfectly before, now did not work either. I made several attempts to get this sorted but in the end I did what I should have done before and called in Bosch. Their guy arrived promptly and found that the element had been wired incorrectly with neutral going to live etc. I short a shoddy and dangerous attempt at a repair. The Bosch guy repaired the faults and now all is well. Do NOT deal with these people. I tried to get them to come back and they left me for over a week with no oven or grill. They are dangerous and in my opinion con men!