Help 85 300dt Where To Start Dead Tach

[hamsanwich81]

iT SEEMS THE 85 HAS A DIFFERENT TACH SYSTEM THAN PREVIOUS MODELS aNY HELP HOW TO TROUBLE SHOOT MY DEAD TACH. THANKS

[20swrt]

check the fuse under the passenger dashboard. there is a relay on the right with a red fuse. I just fixed this today also.

[karugs]

http://www.benzworld.org/forums/2123615-post19.html

My Tachometer works now !!! Thanks
Quote:
Originally Posted by holthoff
Try replacing the 10 amp fuse in the overvoltage protection relay located under the dash on the passenger side, as described in the following related thread:

http://www.mercedesshop.com/shopforu...d.php?t=148095

Apparently that often fixes the tach in later models.


Holthoff,

A big thanks to you. My Tach is working now! I'll check tomorrow if the a/c and cruise control works. I unplugged my cruise actuator earlier coz i thought that would help. I was almost giving up on searching for this valuable information. Im glad i checked the forums today - coz I was about to take the tach sender apart and clean. It's kinda weird how MB incorporated a new type fuse wheras the rest of the car still had the old style. Not to mention how well hidden it was from the rest of the fuses.

After owning this car for 2 months the climate control worked strange - now it works better - I hope it fixes the a/c as well.