I have a Grohe lady luxe kitchen faucet and need to replace the hose but the area under the counter is very narrow and I can't get at it... can it be done from above ? If so, how ?

Grasp the spout arm and pull straight up. Arm should separate from the actual faucet valve assembly. Disconnect the supply tubes and remove from valve from the sink by turning the valve.

the area under the counter is very narrow and I can't get at it
Use what we use. Purchase a basin wrench from your local Plumbing Supply House. Good luck, Tom

See faucet installation instructions.

http://cdn08.grohe.com/lib/1/tpi/1661193.pdf

See Spray and Spray hose connection paragraph and figures 3 and 4.

It appears the spray hose connection is a snapped on connection. Should be able to disconnect by grasping the connector and pulling downward.