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  #1  
Old 05-20-2006, 10:45 PM
Jim Salchenberg's Avatar
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560SEL Check engine light

I have a 1989 560SEL and the check engine light came on. It stays on all the time regardless of engine temperature. No other symptoms and all runs well. Any ideas? Thanks.
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  #2  
Old 05-20-2006, 10:53 PM
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Check the oxygen sensor.
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  #3  
Old 05-21-2006, 01:31 AM
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Thanks I'll check it and report back.
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  #4  
Old 05-21-2006, 04:19 AM
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There is no check engine light in the 560SEL 1989. If so, where is it located?!!!
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Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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  #5  
Old 05-21-2006, 12:37 PM
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It's on the instrument cluster. That row of warning/status lights. Turn key to position 2 and they all light.
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  #6  
Old 05-22-2006, 03:14 AM
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What sort of mileage interval should we change these at?
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I'm not a doctor, but I'll have a look.

'85 300SD 244k
'87 300SDL 251k
'90 300SEL 325k
'91 560SEL 189k

Eight others from IH, BMW, GM, Ford, and Volvo.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #7  
Old 05-22-2006, 03:56 AM
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zcc zcc is offline
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I checked all of the instrument cluster and no check engine light was there!
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Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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  #8  
Old 05-22-2006, 04:13 AM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 9,038
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Mine just says O2 Sensor on the far right...
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I'm not a doctor, but I'll have a look.

'85 300SD 244k
'87 300SDL 251k
'90 300SEL 325k
'91 560SEL 189k

Eight others from IH, BMW, GM, Ford, and Volvo.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #9  
Old 05-23-2006, 11:34 AM
Jim Salchenberg's Avatar
Jimbenz
 
Join Date: Apr 2006
Posts: 12
I checked the 02 sensor and I believe it is ok. It checks at around 6 ohms. The car runs fine and is getting normal gas mileage.

I disconnected the battery and re-connected. Afterward the check engine light did not come on and has not since. I accidently disconnected a vacuum line on a valve the is connected to the exhaust manifold several years ago and the check engine light came on. Perhaps this valve is getting old and may be failing.
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  #10  
Old 05-23-2006, 11:54 AM
GVB GVB is offline
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Join Date: May 2006
Posts: 178
I have to say, reading all of your replies; You all need to find a good reliable Mercedes Shop. Have the codes read by someone who knows what they are doing. I would not recommend just driving it with the light on. Is it a CA car, grey market, Federal?
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