So this is a very familiar site on Mercedes CDI engines not limited to Mercedes and it's a common problem with the injector seal the crush washer underneath the injector starts to leak due to wear this happens due to vibrations and the crush washer just simply starts to give up and the diesel pressure starts and blow away from the side and all that black suit that you see is carbonized diesel quite toxic people be sure to wear protective gear so gloves goggles and face masks as well to avoid all those toxic fumes you don't want to breathe in this diesel it's quite bad for you anyway enough of the lecture you can see me removing the injector here using my slider man and you can see it's encrusted with all that crap you want to clean all this up before it goes back in so we're just prepping the injectors we've got it on a nice wire wheel and then you have to clean up the injector seats but make sure that you use grease at the end of your cutter to collect all the shavings you don't want any of that inside the cylinders believe me we've done that jump before and on our own vehicle wear suit went inside the cylinder and it ended up snapping one of the valves costing us half of the engine rebuild so beware cleaning is this key at this job it is complete it's funny and it's proceeding for four injectors because they're not all leaking quite a half a job there no more toxic fumes inside the cabin for this customer