1985 190e Component Location

Hi Yall!!! I just bought an old 190e and have yet to recieve my shop manual. Can anyone tell me the exact location of the coolant temp sensor in the engine compartment?? I am having cold start issues...frm the searches Ive done so far....looks like a OVP relay Or coolant temp sensor may be the culprit here.....car acts like the choke (for lack of a more accurate term) is inop...runs rough after numerous start attempts & then smooths on out after warm-up....I assume OVP relay is in the fuse box @ the firewall on left side.............a couple of Arkansaw jackleg wrenches were tinkering with the the fuel control before I bought it , so it could just be a wire off somewhere, but I have not found it yet.....................thx, Memphis Rod