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Old 12-23-2000, 09:25 PM
Registered User
Join Date: May 2000
Location: Scotts Valley, CA.
Posts: 145
ON my mother-in-laws' car (1997 SL500 - is that a W129?) every couple of days the fuse that powers the guages in the instrument cluster blows, causing the guages to go dead. My father-in-law has replaced these three or four times now but this keeps happening... any ideas on what to check?

The car is under the Starmark warranty so it'll probably be covered, it's just a matter of curiosity.

Thanks in advance for everyone's help with this. Please send a copy of any responses to if you would. Ken (my father in law) would like to see what the various observations are!

Thanks a bunch.
Jay Yambrovich
Scotts Valley, CA.

1993 300 CE Cabriolet (A124) 131K miles
1997 C-280 133K miles

2000 BMW R1100RT 69K miles
1989 300 E 216K miles (sold)
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Old 12-23-2000, 11:37 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
We had one with those symtoms and the short was in the dome light assy. If it is like ours the problem was evident when we pulled the dome light down and looked at the electronics. There are a number of things in the assy and I forget what was actually shorting, but it was evident on disassembly.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 12-24-2000, 01:50 PM
Posts: n/a
I also had this same type of problem in my W115. Every time I stepped on the brakes the gauges went dead and the fuse blew. Turned out to be a short in one of the rear light assy's. Easy to fix, just a crossed wire.

Good Luck,
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Old 12-24-2000, 03:59 PM
JCE's Avatar
JCE JCE is offline
Down to the Wear Bars
Join Date: May 1999
Location: So Kalifornia
Posts: 2,189
I repeatedly lost the same brake light fuse - turned out to be a bare spot on the end of the cigarrette lighter power wire. fixed the lighter, no more fuse problems! Happy Holidays, sounds like you or your tech are going to have an early Easter egg hunt checking everywhere for shorts!

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E
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