Where is the latch for opening the hood ?

Replace the hood latch. But look first. it could be sensor mounted to the latch that can be replaced. I work on too many to remember. Chevy's to Mercedes. I just look at them and know.

you replace the cable and now you closed the hood ?
it would have been nice if you try it first. no adjustment unless you have double latch.
it has a stopper at front were the cable seat in, posibly come out of the seat, I hope. check it out, the cable should be exactly the right lenght unlees you have the wrong cable or universal cable.

only way i can think of is to remove the center grill so you can get at the mechanism but it means braking it im afraid you cannot get at it any other way

mercedes-benz 190e 1989 the hood latch will not open when you pull the inside release

reach in with long needle nose pliers grab whats left.

if not painted over it will be on the radiator support when you open the hood or on the underside of the hood.

There is a release cable that is attatched to the red releas handle on the drivers under dash panel. You can grab that cable with needle nose pliers to release the hood to the first detent if the handle or cable is broken. There is a secondary release mechanism(called a hood tongue) which routes through the grille where the rectangular slot is once the hood is popped up with the release handle.you can grab the rest of the broken hood tongue with needle nose pliers and pull it out to completly release the hood from the saftey catch. If it is completely broken you can take a long screw driver and push the saftey catch( i beleive to the right) and the hood should be able to open all the way up. Both the hood tongue and the cable(securing portion at release handle) are common failures and break over the years.if it is at the release handle you are having a problem-get a #2 phillips screw driver and remove the release handle to gain access to the loose cable. I hope I have been helpful

under the hood between fire wall and engine underneath the wiper motor. If its not working replace the strip fuse by the driver side strut mount first. Its in a tootsie roll sized plastic case.

There is a switch on your hood latch. They get damaged sometimes when the hood opens and closes. look down on the latch and you will see the sensor with an electrical plug. There are two 10mm bolts holding the latch in. remove them and the sensor is in the latch.

Look at the little opening just to the left and down a little from the Mercedes emblem on the grille.  There used to be a latch there.  If the latch is missing, you can run a wire through the opening and attach to the hood release mechanism so that you can pull it to open the hood (that is of course after you pull the hood release which is located under the dash on driver side left.