This is a view from the bottom, with the tooth lined up with the mag pickup.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

That's awesome Funola, Thank you so much for posting those pics.

The tachometer is now WORKING! I used 7mm nuts to lock in the sensor and used a feeler gauge to get the sensor close to the tooth but not TOO close.

When the car is idle the tach doesn't register any RPM but as soon as I push on the accelerator the needle jumps to life! What a sight to finally see!

thanks for everyones help! What a project! Glad I can move onto something new!

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'85 Euro 300D - 258k 4 spd manual
'85 300TD Wagon - 180k - SOLD
Always looking

Tach should work at idle. You are not getting a strong enough signal from the mag pickup. You need to decrease the gap to get a higher output. What is the gap set to currently? Use a thinner feeler gauge.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked