I have just ordered a small 30 degree exhaust pipe to replace the backbox, it looks like the bend just before the backbox is corroded and has been patched up using the exhaust gum stuff. I am going to simply cut off the rear backbox and replace it with a single pipe.

This will free up both the exhaust gasses as well as reducing a fair bit of weight (will weigh it when I remove it). Also if I need to I can easily add on a different back box if the UK MOT requires me to run one, although I still have the stock cat and mid box and diesels aren't exactly loud!

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!