I've seen a lot of talk on here regarding different brands of glow plugs for W123 models and it usually boils down to either Bosch, Beru or Monarks but I was wondering how genuine Mercedes glow plugs compare? I know there are some parts where going with genuine Mercedes parts is worth spending the extra money on but are glow plugs not one of them? I don't feel like many people on here buy them. Is that because of price or is it because Bosch or a different brand is better? If money was no object and you had to choose between genuine Mercedes or Bosch glow plugs, which would you choose?