1987 300 SDL - NO Tach! Please Help - Plus Pictures!
Thread Starter
Newbie
Joined: Dec 2003
Posts: 1
Likes: 0
From: York, PA
300 SDL, XJ6, XK120, tii, Model A, E30, M5, M3, 5000CS,
1987 300 SDL - NO Tach! Please Help - Plus Pictures!
I pulled my 300SDL out of storage and brought it up on maintenance:
Oil change
Fuel filters
Air filter
Power steering flush and filter
Trans service
Brake flush with ATE super blue
Coolant flush
Belt
Belt tensioner
New tires
Wheels refinished
Full detail - Menzerna, Klasse AIO, P21s hand wax, Klasse sealant
Now - my tach is not working and my AC is out as well. I have researched and found that the compressor works as a function of tach output therefore that would go down if there is no tach signal.
My question is - what could make the tach signal go out? I have already tried a new overload relay with no success. What is the next step?
Car in question...
Oil change
Fuel filters
Air filter
Power steering flush and filter
Trans service
Brake flush with ATE super blue
Coolant flush
Belt
Belt tensioner
New tires
Wheels refinished
Full detail - Menzerna, Klasse AIO, P21s hand wax, Klasse sealant
Now - my tach is not working and my AC is out as well. I have researched and found that the compressor works as a function of tach output therefore that would go down if there is no tach signal.
My question is - what could make the tach signal go out? I have already tried a new overload relay with no success. What is the next step?
Car in question...
Super Member
Joined: Jan 2012
Posts: 603
Likes: 8
From: Maryland
2022 E450 Prior:2021 S580 2012 E350BT, 2013 GL350BT, 2009 ML320BT, 2006 E320CDI, 1987 260E
Sorry I can't help but your car looks amazing. How many miles? the Engine bay looks extremely clean. My dad has an '82 280SE that color combo.
Senior Member
Joined: Jun 2004
Posts: 382
Likes: 4
From: LI, NY
(1960) 300d, S550 AMG S500 S600 560SEL
take cluster out using proper tools as not to destroy the plastic lens, check the connector to see if they are tightly attached, this is usually the culprit, spray with contact cleaner making sure the terminals are clean and dry before reinstalling. you might also wanna check the terminals for power.
