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#1
03-06-2009, 04:51 PM
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87 300SDL Tachometer Stopped Working
Yesterday I was driving and the tachometer stopped working. Does anybody know how the tach works, and operates. I think I have heard that it work on air pressure or something. Does anybody know how to fix it because i dont think that the actual meter is broken.
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#2
03-06-2009, 05:22 PM
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OverVoltage Protection Relay
Find this sucker,and check the blade type 10 Amp fuse in the top of it.
('Behind the Battery?)
__________________
'84 300SD sold 124.128
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#3
03-06-2009, 10:38 PM
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It must be contagious, mine stopped working on the way home tonight. I guess I'll check the fuse tommorrow.
'91 350SD 535,000 destroyed '87 300SDL 254,000 '94 SL500 45,000
__________________
jcciem '94 SL5000 60,000 '91 350SDL 545,000 '91 350SD 197,000 '00 E55 AMG 77,000
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#4
03-07-2009, 01:24 PM
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It wasn't the fuse in the overvoltage protection relay. Any other ideas?
'91 350SD 535,000 destroyed '87 300SDL 254,000 '94 SL500 45,000
__________________
jcciem '94 SL5000 60,000 '91 350SDL 545,000 '91 350SD 197,000 '00 E55 AMG 77,000
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#5
03-07-2009, 01:36 PM
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Mine quit some time back, it was an IC on the tach board. So hard to get the IC, the shop just replaced the tach board with another working board with the correct ratio.
__________________
1986 300SDL 201K Daily Driver 1984 300D In Progress 1989 240GL 196K Swedish Brick 1984 300SD -- Sold 289K ------------------------------
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#6
03-07-2009, 09:00 PM
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replaced the fuse and its works again.
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#7
03-08-2009, 01:25 AM
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On my SD my tach was working intermittently you might try checking the grounds on the back of the inst. cluster.
just an idea...
__________________
Regards, Ian White 1995 E300 Diesel w124 OM606 2014 E550 w212 M278 biturbo 2001 BMW 740i E38 M62 (past) 1981 300SD w126 OM617 (past)
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Linear Mode
