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  #1  
Old 04-18-2006, 09:29 PM
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1995 C280

hi!

I am having a problem with my 1995 C280 , sometimes it cranks but dosent start, i hear the fuel pump working but i took one of the wires off one of the coils and i got no spark when i crancked!! so it;s spark related i am pretty sure. has anyone had a similar problem?


Last edited by TOM77; 04-18-2006 at 09:41 PM.
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  #2  
Old 04-18-2006, 09:43 PM
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Has the wiring harness been replaced -- this is a warrenty thing, I think (bad insulation)?

Otherwise, likely a bad TDC sensor (rear of engine) or a bad ignition unit, possibly bad coil(s) or wires.

Peter
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  #3  
Old 04-18-2006, 11:31 PM
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i dont get spark at any coil, so its not the coils .. what are the chances of all the coils going at once, would the TBC sensor cause no spark? how about the crank sensor? and what part of the harness goes? what area should i look for a bad harness wire?
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  #4  
Old 04-19-2006, 07:18 PM
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anyone !!!
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  #5  
Old 04-19-2006, 08:26 PM
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O.V.P. Relay.......................
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  #6  
Old 04-19-2006, 09:36 PM
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what is the O.V.P relay? where is it located? does it cut off spark?
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  #7  
Old 04-19-2006, 11:22 PM
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Maybe this will help.
http://www.classic-roadster.de/cgi-bin/showitemlocation.cgi?TYPE=W202&X=7&Y=6&SORT=ITEM&START=K&ITEM=K1
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  #8  
Old 04-19-2006, 11:53 PM
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thanx for the link. so what does O.V.P stand for? and how much are those relays?
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  #9  
Old 04-20-2006, 04:43 AM
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Quote:
Originally Posted by TOM77
thanx for the link. so what does O.V.P stand for? and how much are those relays?
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1M30LAGSC1S80C4YGQ&year=1995&make=MB&model=C-280-001&category=P&part=Overload+Relay


Use the SEARCH feature

There is enough info there to fill a phone book.

Last edited by Arthur Dalton; 04-20-2006 at 05:40 AM.
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  #10  
Old 04-20-2006, 12:02 PM
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Overvoltage protection relay (or something like that).

If the wiring harness is bad and has not yet been replaced, the chances are slim of getting a goodwill replacement from Mercedes anymore.
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  #11  
Old 04-24-2006, 06:55 AM
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Quote:
Originally Posted by Gilli
I am having the same problem. The car cranks but won't turn over. This will happen sometimes 5 or 6 times in a row untill the engine fires up. I have had the wiring harness, engine cable, fuel pressure regulator, and the fuel pump relay all replaced, the fuel pump was not coming on with ignition truned on so had the connections from relay to ecm cleaned. The car has 71,118 mostly highway miles. They are now telling me the computer needs to be replaced!

OVP
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  #12  
Old 04-24-2006, 01:45 PM
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OVP Link

A Dalton: I can't access the search in the link you mentioned earlier. how do I find the information I need on this part? There are 2 parts listed with the same number but different prices. Which one do I need to order? Thanks for your Help!
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  #13  
Old 04-24-2006, 02:16 PM
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Quote:
Originally Posted by Gilli
A Dalton: I can't access the search in the link you mentioned earlier. how do I find the information I need on this part? There are 2 parts listed with the same number but different prices. Which one do I need to order? Thanks for your Help!

They are the same, just different Brands

Go here and read thread #11

http://cgi.ebay.com/ebaymotors/MERCEDES-230SL-250SL-280SL-250-280-SL-BOSCH-FUEL-POMP_W0QQcmdZViewItemQQcategoryZ10076QQitemZ4632880588QQrdZ1
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  #14  
Old 04-24-2006, 03:10 PM
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Crank sensor. My 94 did the exact same last week.
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  #15  
Old 04-24-2006, 05:25 PM
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Quote:
Originally Posted by brookspw
Crank sensor. My 94 did the exact same last week.
That is also a possible..
Next time it does not start, give the OVP a few taps with a screwdriver handle and retry,,
Both of these items effect ignition, so either will have the same symptoms..............
The crank sensor can be detected with a scope, but that will take a Tech.

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