Looking at various options for warranty on a 2004 C55. I have two questions: 1) Does anyone have any feedback on using AutoProtect, RAC or AA? I'm looking at their medium/silver type cover that does most electrics and engine bits, rather than the very basic "big lumps" cover. 2) On a C55 in particular, would 6 months at £1000 per claim limit be better or worse than 12 months at £500 per claim limit? In both cases it's a multiple/unlimited claim policy for separate claims (AutoProtect "silver").