Works all of the time! reporting info to computer of the "air flow position". This helps the computer to richen the mixture durning acceleration & leaning the mixture for emissions all of the rest of the time.
Will cause IDLE & acceleration problems!
Replacement WON'T help the engine to produce more HP at all.
MB part number is 000-074-23-14.
Bosch number is 0 438 121 044.
I would replace the rubber pleminum boot that mounts to it as well, MB number 103-141-00-90
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)