In the A-class my father's commitment came too late. With an annual mileage of more than 170tkm the first injectors are over. Unfortunately, the exchange is very expensive. I have this cleaner for about 6 tkm in use and am thrilled. My car has now down well over 160tkm and purrs just like the first day when I picked him up again from the dealership. Unfortunately LM gets the new car smell no longer go :-)