The part with screen is the air-mass sensor. You must remove that sensor & the rubber boot that connects it to the throttle housing so that the housing can be "scrubbed" clean! SPRAY cleaners WON'T cut the crap(dark mustard).

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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