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  #1  
Old 08-04-2003, 11:28 AM
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Join Date: Aug 2003
Posts: 2
93 mercedes 300te no start intermittent

I am working on a 93 300te that intermittently is hard to start. it cranks fine but is either not getting spark or fuel. it has a code 12 inthe sysytem but I lack a 93 manual to tell me what the code is.
we here a buzzing noisefrom about the air inlet and it will start, if no buzzing noise car will not start.we tap on top and it will start.
Any help would be appreciated.
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  #2  
Old 08-04-2003, 02:59 PM
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Join Date: Apr 2002
Location: Surrey, Uk
Posts: 254
Code 12 should be open or short circuit lamdba sensor heater. this would not stop the car from starting.

Fuel pump relay is a likely culprit for intermittent non starting.
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Mick J
'08 Chrysler 300CRD (MB OM 642 engine)
'95 E220 estate
'89 230TE (R.I.P.)
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  #3  
Old 08-04-2003, 05:23 PM
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
OVP relay , [aluminum rectangular can behind the panel, rear of battery]... tap that one ... on HFM/SFI 104 cars, that causes No spark/No fuel} as it powers ECU
There has been a part change on these .. if the old was made by Siemens. Austria, change it....
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  #4  
Old 08-05-2003, 05:07 PM
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93 mercedes 300te wont start

I am looking for the updated part numger for the ovp relay . according to the dealer this part has not been updated and the part number given to me is 0005406745 appreciate your help
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  #5  
Old 08-05-2003, 05:40 PM
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Join Date: Aug 1999
Location: Florida / N.H.
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Re: 93 mercedes 300te wont start

Quote:
Originally posted by grautorepair
I am looking for the updated part numger for the ovp relay . according to the dealer this part has not been updated and the part number given to me is 0005406745 appreciate your help
That is the new #
the original was 000 540 52 45

Pull the one in there and see if has already been changed [ most likely, as all the orig 52 45 crapped by now]
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  #6  
Old 11-14-2003, 06:30 PM
Manuel 300CE
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new / updated OVP for W124

Just replaced the OVP on my 93 300CE coupe:
- original part #: 000 540 52 45
- replacement part #: 000 540 67 45

They look very similar, although the (blue 15A) fuse is oriented differently on the new part.
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