SL/R129: turn signals
Thread Starter
Junior Member
Joined: Dec 2012
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From: FLOMATON, ALABAMA
Mercedez 1995 SL500 r129, 1967 Camaro RS Convertible, 1971 Corvette Stingray T Top
turn signals
MY LEFT AND RIGHT TURN SIGNAL FLASH FAST AND "LAMP OUT" YELLOW LIGHT ON DASH ELUMINATES WHEN TURN SIGNALS EXECUTED. LAMP OUT YELLOW LIGHT ELUMINATES WHEN HEADLIGHTS TURNED ON. EMERGENCY FLASHERS WORK NORMAL. I HAVE CHANGED ALL TURN SIGNAL BULBS WITH MB BULBS.
THINKING MAYBE FLASHER PROBS, BUT MB SAYS THERE IS NO FLASHER, THERE IS A CONTROL UNIT ONLY.
Chetter sends
THINKING MAYBE FLASHER PROBS, BUT MB SAYS THERE IS NO FLASHER, THERE IS A CONTROL UNIT ONLY.
Chetter sends
Junior Member
Joined: Jun 2012
Posts: 25
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From: Tuscumbia (Northwest) Alabama
1994 sl320
outside light warning
Chetter: Had a problem with the warning light on my 94 sl320, could not find any reason for it until i followed the car at night, only half the tag was lighted. replaced the tag light and warning went out. However this did not affect the turn signal speed. Good luck.
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Joined: Jul 2010
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From: California
1992 400E, 1997 SL500, 2009 R350, 1977 Ericson 32
I had a similar symptom when I had to replace my turn signal socket. I had the polarity of the wires wrong. Have you recently replaced the socket?
Thread Starter
Junior Member
Joined: Dec 2012
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From: FLOMATON, ALABAMA
Mercedez 1995 SL500 r129, 1967 Camaro RS Convertible, 1971 Corvette Stingray T Top
Have not replaced any sockets. Replaced all turn=signal bulbs with MB bulbs. It has been suggested that I check the "Lamp Control" unit located in a relay panel under hood, left side, behind the fuse panel. Also suggested that I coat the bulbs with dielclectric grease, which I have not done but will when I can find some. Thanks for your suggestions. 
Thread Starter
Junior Member
Joined: Dec 2012
Posts: 52
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From: FLOMATON, ALABAMA
Mercedez 1995 SL500 r129, 1967 Camaro RS Convertible, 1971 Corvette Stingray T Top
Turn signals
As of today..... 16 Feb 2014.... my turn signals continue to "quick flash" and the yellow "lamp out" dash light illuminates. Still need more advice.
Super Member
Joined: Jul 2010
Posts: 598
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From: Eastern Kansas
94 SL 600, 98 993, 89 XJS Conv., 85 Daimlier Princess 16 Hybrid Lincoln 16 Chevy crewcab
the Flasher, light control relay would be my bet. If memory serves it is not cheap, but once it starts to malfunction it does not repair itself!.
I remembered as above the foot well on the drivers side ( in Kansas )
Good luck
I remembered as above the foot well on the drivers side ( in Kansas )
Good luck
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Thread Starter
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Joined: Dec 2012
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From: FLOMATON, ALABAMA
Mercedez 1995 SL500 r129, 1967 Camaro RS Convertible, 1971 Corvette Stingray T Top
Quick Flash I removed the "LAMP CONTROL UNIT" several months past. It has many male pins protruding from it. They all looked good. I coated them with dialectric compou and sniffed it to see if I could determine if it had overheated ...... nothing! I would be interested to know if anyone has ever removed the cover to determine what caused the failure and if it is repairable.
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Thread Starter
Junior Member
Joined: Dec 2012
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From: FLOMATON, ALABAMA
Mercedez 1995 SL500 r129, 1967 Camaro RS Convertible, 1971 Corvette Stingray T Top
I was a Navy aircraft electrician for 26 years in one capacity or the other and would love to learn the THEORY OF OPERATION and FUNCTIONALITY of the "Lamp Control Unit". The Benz service manager states "there is a light bulb not working somewhere in the car and it may not be in the turn-signals". The owners manual states " the EXTERIOR LAMP FAILURE INDICATOR LAMP" will come on: If an exterior lamp fails, the indicator lamp will come on only when that lamp is switched on. If a brake or turn signal lamp fails the lamp failure indicator will come on when applying the brake or actuating the turn signal and stay on until the engine is turned off.. I can turn on head lights, fog lights, trunk light, reading lights, open doors to actuate courtesy lights, and the LAMP OUT warning light does not illuminate. However, each and every time I actuate the turn-signals, left or right, the warning light illuminates and stays on until I turn the engine off. My previous post have described in detail all efforts I have made to solve this problem. Any help out there?
