On my MOT last month, one of the advisories was "corrosion on fuel pipe" which the examiner did show me, though I'm not convinced it was the fuel pipe as it could easily have been for the sls or brakes. Either way, I'm going to get it up on a ramp next week to have a proper look as I think there are least 2 pipes over the rear sub frame that have started to corrode. The first question is whether the MB pipes come pre-formed, or as a length of pipe that needs to be shaped to fit? I assume the later, in which case, is tehre any benefit to using genuine MB parts for this? Secondly, are all of the fuel/sls/brake pipes safe to replace with cupro nickel? if so, does anybody know the diameter needed and a good place to purchase this? I've googled it and can only find demon tweeks. Not sure which route to go yet, cupro nickel or genuine MB steel. While the sub frame is lowered I'll have a good look at the sub frame and underside in case of corrosion and probably replace the bushes as a matter of course as at 18 years and counting there can't be much life left in them. Are the rear sub frame bushes the same for all W124 variants? my reg doesn't work on the ecp site, and when entering car details manually there is no differentiation between saloon, coupe or estate, and the part description isn't helping. The GSF site is frankly a joke, so no help there either. Are these the ones I'd need for an estate? (1993 320TE) Mercedes-Benz | Euro Car Parts UK Thanks in advance.