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The injector on the Vito 638 started whispering, I change the copper washer and clean it from resin. About two months ago, while driving, I heard the injector whispering, it was small, but it was clear that it was time to change the washer under the injector. I bought the washers, but I took on the replacement after about 2 months, and look what came of it. Replacing the copper washers under the injectors was successful. How to unscrew the injector bolts on a Mercedes • Knock so as not to break the bolts when...