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#1
12-05-2005, 10:16 AM
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Help - I did the unthinkable!
I was in a hurry, and brain not fully engaged, while changing the battery in my wifes '89 560SEL and didn't notice the posts on the (wrong) replacement battery were reversed. So the car was hooked up with reverse polarity for a brief instant. Sparks told me at the first touch that it was wrong.
Luckily it still starts and runs. The ABS light is on, the Check Engine light seems to be non-functional (possibly burned out bulb) and the car is idling at about 1800 rpm. Otherwise all the systems seem to work. How do I get diagnostic information from the car so I can figure out what I need to replace?
__________________
Tom Gentry '89 Mercedes-Benz 560 SEL '96 SVT Mustang Cobra (Mystic #1345) Life is too short to drive boring cars! 
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#2
12-05-2005, 10:51 AM
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Check the fuse..
..red, 10 amp fuse on top of the OVP.
__________________
"Dangerous with a wrench...and not smart enough to know it" Stable (in order of acqusition): '84 500SL, 280SEL (Euros) '77 280SE. '90 560SEL '79 450SEL 6.9, '95 C280 (totalled by daughter 8/07) '81 280SL (rescued) '88 300CE '86 560SEC '95 C36 '01 CL55 DD's: '04 S500 4Matic (SWMBO) '04 F150 Crew
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#3
12-05-2005, 10:53 AM
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...which is why the OVP is there in the first place...so that this type of incident doesn't fry more expensive components down the line...
...sometimes over-engineering is a GOOD thing... 
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#4
12-05-2005, 11:26 AM
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Check the silver small box near the fuse box and near the break pump.
__________________
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
12-06-2005, 10:59 AM
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It was the 10amp fuse in the OVP. A big thanks to you guys, I didn't even know about that device until it was mentioned here. And thanks to MB for saving me from disaster.
__________________
Tom Gentry '89 Mercedes-Benz 560 SEL '96 SVT Mustang Cobra (Mystic #1345) Life is too short to drive boring cars!
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#6
12-06-2005, 11:45 AM
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LOL! NICE! Looks like your fuse exploded instead of the entire OVP itself! SAFE!
And yes, thank the OLD Mercedes-Benz, THE BETTER MERCEDES-BENZ! OLD SKOO 4 LYFE! YHEAH!
__________________
2006 BMW M5 "Heidi" @ 109,000 miles 2005 MBZ C55 AMG "Lorelai" @ 165,000 miles 1991 MBZ 300E "Benzachino II" @ 165,000 miles 1990 MBZ 500SL "Shoshanna" @ 118,000 miles (On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
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#7
12-06-2005, 12:41 PM
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You REALLY dodged a bullet here. There should be a SAE specification that each individual component (ECU, radio, etc) in a car should be able to withstand reverse voltage indefinitely - but there's not!
__________________
86 560SL With homebrew first gear start! 85 380SL Daily Driver Project http://juliepalooza.8m.com/sl/mercedes.htm
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