Gilly, maybe you should look at a new one compared to an original. The replacement one goes into the intake manifold farther. WE cleaned these pipes for a couple of years BUT after 2-3 times with check engine lamp some people get up-set. With a new pipe you should get 3-5 years w/o problem.
WE do at least one of these EVERY day!!
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)