Coming from KLK to DLI in sleeper class is harrowing as the coaches are already filled up with unreserved paxs who just won't budge to give you your own seat. Happened on April 1 night with me and my friend. Even calling up RPF personnel deployed didn't help much and matter took turn for worse at CDG. Scores of people again boarded the SL coaches and looked up for floor space between our berths. Again we went to the RPF constables who directed us to instead talk to the TTE who told the constables to handle it. Much to our dismay they told that it wouldn't be of much help and we must rather upgrade to 3AC. We finally got our bags with us and went to TTE who then happily upgraded us by charging "FEE" of ₹600 for two people, though it was cheaper than getting a receipt from him....
more...
Finally we went to our respective "upgraded" berths and had some peace on our platter.
From DLI to KLK the SL seats are usually available and it's a comfortable journey, though the train is usually already late by 2-3 hours. Hope it helps.