We started crate training with our older pup (note: a collie x, not a cocker) using the Victoria Stilwell crate training method (you can find it on YouTube). We have the crate in the utility room, tucked between the washer and the fridge, and stuffed with a big duvet, her favourite (smelly!!) blankets and covered with a big warm fleece. She likes making a nest in it. We were told by the rescue centre never to push her into her crate; always be patient and wait for her to go in of her own volition.
We tried to make the crate as exciting as possible by, for example, hiding titbits in there so our dog finds them during the day, and doing clicker training - after a lot of time spent clicking and treating once she's got her whole body in the crate, she now knows the cue 'Go dodo!' (dodo = French for sleep) and goes into her crate. It helps that the crate is next to the fridge - she now ducks into the crate as soon as I open the fridge door as I often drop tiny bits of treat in through the crate roof! I try to keep her guessing.
She also gets her stuffed Kong and other long-lasting treats in there. I also totally ignore her once she's settled in her crate, as she (not surprisingly) doesn't react well to being peered at like an exhibit once in there. When we play 'Find it' I always put a few treats hidden around her crate blankets and it's now the first place she looks which is great as it equals positive association with crate!
I often play relaxing doggy music (from YouTube - relaxmydog is the user) while she's having crate time.
When we adopted her at seven months, she wasn't potty trained (or trained in any way at all!) and she did have two peeing accidents in her crate, which we understand is quite rare as they don't tend to toilet where they sleep. We put it down to her being confused and us misunderstanding her request to go out. She's been fine ever since.
She now immediately goes into her crate by herself after the evening walk and settles down with a small snack. We don't hear a peep out of her until we go down at about 8am.
I can understand how hard it might be with a dog who is wary of the crate. Our dog is unfortunately wary of the car so we've been very gradually building up a good association with it, by, for example, smearing primula on the side of the car (ick - the things we do for them!) after every walk so she learned to seek out the car, and getting Tilley's Favourite Person, (i.e. my mum!) to sit in the car while she fed Tilley, etc. She used to back away from the car but has since done a couple of short journeys. This kind of softly, softly approach might help?
Good luck!