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#16
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OVP relay
Like everybody else I have had problems with this cunning device. The biggest problem is the circuit board which has holes which are far too big for the pins and components soldered in them. I believe the vibrations of the relay stresses the soldered joints resulting in a crack which is very difficult to see even with a magnifying glass. Resolder all the joints with plenty of solder first before throwing it away.
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1993 320E 140,000km |
#17
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86560SEL, The OVP isn't model-specific, but there have been several versions of it (5-pole, 7-pole, 9-pole) and the earlier ones and the later ones (approx. 1988+) have different part numbers. Early 80s 126 V8s (thru MY '87) have OVPs that should work; not sure that W116 even had an OVP. S-class experts will know for sure and can correct me on that. Why do you think that you need an OVP?
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1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't |
#18
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Quote:
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#19
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Quote:
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1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't |
#20
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Might also be to protect against "load dump" when the field collapses in the alternator and other devices after being shut off, can cause a high-voltage reverse-polarity pulse known to us who design automotive electronics as "load dump".
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Gone to the dark side - Jeff |
#21
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M.B. realised that this was a troublesome item when the cars were in production. They tweaked the electronic specifications to try and get them dependable and reliable.
There advise is to get the latest model of OVP available. As the previous poster has mentioned - why risk expensive components for a comparatively cheap item. Rubber products and electronics decay over the years whether used or not. In the electronics industry we know there is gradual deterioration of electronic components due to slight alteration of chemical properties of materials, static and electrical or RF interference. These problems manifest themselves ranging from intermittent faults and operation to ultimate breakdown. |
#22
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Thanks... well my car is actually a 6-cylinder (300SEL). Now I wonder if the V8 / I6 relay is compatible?
The reason I think I may need one is that my car has very recently and suddenly started to stall out when I come to a stop. It always starts back up and goes fine and runs smooth. I am also getting 21 mpg in town. On other threads however I have also been told it could be a vacuum hose or a bad fuel pump. I am going to try to take it to a Mercedes indy shop next week to have it checked out. Parts page is finally up and I think this is the new one... http://catalog.peachparts.com/ShopByVehicle.epc?q=1988-MERCEDES--BENZ-300sel&yearid=1988%40%401988&makeid=63%40%40MERCEDES%2DBENZ%40%4063%40%40MERCEDES%2DBENZ%40%40X&modelid=6220%3AMBC%7C1515%3AED%7C10000012%40%40300SEL&mode=SS&yearid=1988%40%401988&makeid=63%40%40MERCEDES%2DBENZ%40%4063%40%40MERCEDES%2DBENZ%40%40X&modelid=6220%3AMBC%7C1515%3AED%7C10000012%40%40300SEL Thanks again. Quote:
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