yes, have cleaned the injector lines at the distributor. this is something I do every couple of months, i would have hoped the fuel filter would clean most of it but the first squirt always seems to come out rust coloured, so there's obviously some corrosion somewhere along the line.

now in the process of cleaning the injectors, seeing as changing two of them has solved the running rich on two cylinders. have also obtained some special mercedes additive. don't know what's in it as there's no label but it must be strong, one capful is sufficient to treat 40 litres of fuel.

have also regapped the plugs to .9mm to see if that improves combustion.

mixture overall looked a bit weak, judging by the colour of the plug insulation. was grey on one side, blackish on the other. Not quite the nice biscuit colour I'd like to see but I'll run it a while and check again.

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1987 300e manual 250,000 km (sold)