When putting switch in close position answered by a verified mercedes mechanic.
Slk roof switch not working.
Relays are affordable and having a spare is a good idea.
Swap it with a known working relay that is identical.
They often seize up give the rod a bit of a twist and then close the boot.
The relay can not be inspected visually but there are ways to test them.
Check the convertible top relay as well.
Next check the micro switch where the divider locks.
There s loads it could be but make sure you have the blind pulled out in the boot and have a look at the rod that goes from the boot push key hole down to the latch.
Slow blinking red light.
If not the switch or wiring between the switch and relay could be the problem.
Roof will not open after dead battery.
Replace the convertible top relay if necessary pn 0025421319.
One trick that you can try is to locate an identical relay in the fuse box keep note which system it serves and swap it with the convertible top relay.