190 E - Where is OVP located?
 

Bought a new OVP from Bekkers since that might help with the hard start and lumpy idle. Where is the OVP located? I have a 1988 190 E 2.6L with 5-Speed. I thought it was behind the battery. By the battery, back behind the black plastic shield/panel, I found a relay with a clear plastic top and unerneath the top were two 10 amp fuses. When I pulled it out, there were nine pins - my new OVP has only six. Was that the OVP that I pulled out and the new one just has to be put into the correct pin/pattern? In other words, the nine pin relay just had some extra dummy pins. Or is the OVP located elsewhere? Checking the Service Manual CD, it sees as if the OVP might be located under the fuse panel on the drivers side, under the hood, back by the firewall - the one with the clear plastic cover with two snaps. That is to say, the OVP might be located on a second layer underneath the main fuses and that top fuse panel has to be removed to get to the secondary panel of relays. Any help is appreciated. Gee, I love these Fourth of July chores. So easy to do. Shouldn't take more than ten minutes, right?

Not entirely sure about the 2.6L, but on the 2.3L, the OVP is with the other fuses in the fusebox, R4, which is above fuses 5 & 6 in the box.

So, it is not behind the battery. It is under the hood over on the drivers side, on a second layer of fuses/relays, below the fuses that you see when you look into the clear plastic cover. The Service CD indicates two screws and two nuts to take off that first layer. Correct? BTW, hope you had a fun Fourth of July. It's dark now and the neighbors are just starting to light 'em up.

I don't think you have to remove the fusebox to access the OVP relay. Just remove the cover of the fuse box and check the legend printed on the top.

OVP on my 1991 190e 1.8
 

Here's a photo of the OVP relay in my 190e right next to the ECU.

On my kid brother's 190e, the OVP had a blck top and had only one fuse.

Mine, I believe, is the updated version with the red top and two fuses (10A).

Hope it helps.

Azhari, I'm not sure how your pic of a RHD model might apply to a US model. It looks roughly like the mirror image of our '91, but this might nor be the case in '88.

Steve

If you need a picture, I can post one from our '87 2.3 (U.S. model)

Haasman

Yeah...
 

Haasman's '87 would probably be the closest to Trex's car.