My 240D has stopped registering mileage. The Spedo works, just not the mile counter? Any Ideas? Also my fuel gauge quit working, oil pressure and temp are just fine. What ohms reading should I look for when checking the sending unit?
Thanks for the help in advance.

The odo most likely has a slipping gear. Take it out and you'll probably be able to spot it. Usually some CA glue will do the trick.

If you apply 30 ohms resistance across the brown and other two wires at the sender, one of them will have the guage reading about 2/3 full.

I'm not sure what the normal resistance range is.

Bruce McCreary
'85 300D, '83 300CD, '85 300D

Gave up on the fuel sending unit and was able to find one on line from a junk yard in Ca. for $45.00, works fine now. Should be able to find replacement speedo at the junk yard, was at my favorite bone yard the other day and found new clock for the dash, and it works!

__________________
'05 Ford Escape 100,000 miles
'87 560SL 92000 miles
'89 300TE 199,000 miles
'02 Audi TT 100,000 miles
'00 Ford Excursion V-10 121000 miles
'92 Mercury Capri 100000 miles
'02 BMW 325XI 60000 miles
'92 230CE 160000
'87 BMW 535SI 160,000 miles
'93 Rinker Captiva 209
5 Kids
2 Dogs
1 Wife

Do a search, the odometer fix is very easy!

basically, you just glue the zinc drive gear back onto the shaft with some LockTite, but be carefull, you can glue the wheels together too! This does NOT require removal of the shaft (the wheels go everywhere when you pull the shaft out, and I don't recommend you do so).

Any junkyard odo of the same vintage will have the same defect sooner or later.

Don't reset the trip odometer while the car is moving, it causes the odometer to bind and this makes the gear slip -- sooner or later it slips all the time.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!