Hi,
I also had such issue last time. IME its about pad to disc matching (quality and material wise).
I've tried OE pads with Meyle disc. Followed bedding procedures but it warped afterwards with less than 100km travelled. Once warped it can't be repaired unless skimmed. Discarded Meyle disc and installed Bosch. Followed bedding procedures again (re-using same pads) and still got warped after 500km. Finally installed ATE disc, same procedures again and this time ok.
Bedding procedures are important otherwise the brakes won't bite effectively. Won't know what braking situation you'll encounter along the way so don't take the risk. The 900 series is a heavy car.
I also tried not to step on the brake during red light (to avoid the hot pad material marking the disc) by shifting to N, but this also not effective when using Meyle and Bosch disc. They still warp. Repeated same thing later with ATE and all ok.
Always using OE pads. Haven't tried disc brands like Zimmermann or Brembo.
Regards,
Amarin
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