Amazon were great spoke yesterday, new kit arrived today. Obviously tried them before cutting the plugs off to squeeze through the cable route. Connected the + to battery, and both negatives to the - battery terminal. Yippee engine starts, LEDs work, cut engine LEDs stop .... perfect. Tried 4 times, perfect Other than I was advised by MB main dear, to use the VEP [vehicle earth point] So I .Swapped the earth point to the Vehicle Earth Point. It Worked 3 times with no switch off, and then reverted back to switching on the LEDs, then 9 secs later they turn off and then come back on again 2 secs later. But now its doing this 3 out of 5 times. I also wonder if I had left the negative on the battery - terninal, would it have started to play up there too. ( rain stopped testing out) It could be 1. Amazon have a faulty batch 2. By using the V.E.P the battery control module is doing something these DRLs dont like. Where would you earth them? Battery negative terminal or the VEP? If tomorrow I put the earth back on the battery and get no faults, would you ignore MBs advice and do what the instructions say , namely use the battery negative as the earth? Or do as MB say and use the VEP, and live with the switch off routine. Personally I could handle the switch off, I am. Only concerned something is not working correctly and wonder could that damage the car? Any views much appreciated and does anyone know, what does this battery control module actually do?