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#1
12-14-2005, 12:25 PM
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Is there any possible way?
Is there any possible way to fix the Ignition Control Unit for 560SEL 1989?
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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 
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#2
12-14-2005, 07:49 PM
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Replace it!
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#3
12-15-2005, 12:54 PM
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With this kind of stuff, there's some electronics, and then a big rugged high-voltage output transistor. 99% of the time, the output transistor fails, sometimes from age, sometimes from it's control circuitry leaving it on all the time and burning it up (a lot like the horizontal output transistor on a CRT-based TV set).
I'll bet it is a Bosch P/N and not available as a separate item. But there are functional replacements out there. If the unit is disassembleable, it would be interesting to do a post-mortem on it...
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86 560SL With homebrew first gear start! 85 380SL Daily Driver Project http://juliepalooza.8m.com/sl/mercedes.htm
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#4
12-15-2005, 01:10 PM
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Well I disassembled it
 It's so complex unit, they use sliver molded and some selecon melt which is impossible to repair. there was a failing silver wire (actually a capillary wire) that is originallt melted with the selecon. No handy tool would fix it, it's all a factory made. In Kuwait 90% of its failure is that capillary wire. I also changed the ignition coil with a new one as recommended.
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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
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#5
12-15-2005, 05:50 PM
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Hello zcc,
can you post pictures of the dissassembled unit? It will help everybody.
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Keep us posted especially if your problem is solved Present cars: My car: E-class 420CDI, 2008, W211, V8, 180 000km Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km Son's one: GLK class, 220CDI, 2009, W204 Sold: E-class 260E, 1988, W124, Wonderfull car sold after 489 000 kilometres of reliable services (engine M103, clutch, brake system and 5 speed manual gear box all original). Sold: E-class, 320CDI, W210, 2000, 225 000km
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#6
12-16-2005, 12:39 PM
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I left the EZL unit (Ignition Module) at the garage. I will try to so. But belive me it's really impossible to fix it's irreparable.
By the way, it has 8x8 pins (European specifications) not like the US one which has 4x4 pins. So it's not like the one in the picture.
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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
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Linear Mode
