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#1
08-14-2007, 06:59 PM
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Crank Sensor/Tachometer
My tachometer does not work on my 190 E 2.3. When I replaced my water pump I took the crank sensor off to clean it. My tach worked when I put the car back together - for a while.
My Question: Is my tach not working an indicator that I will be having intermittent trouble with the crank sensor in the future? Thanks John Mlynick Shelburne Falls, MA 
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#2
08-15-2007, 08:19 AM
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John, what year car?
On the 1987 & later cars the crank sensor is at the REAR of the engine. On 1984-86 cars the distributor sends the signal. The tach signal comes from the ignition module. IF the engine is running then the crank sensor/distributor isn't at fault for the tach being INOP.
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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) Retired Moderator
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