Kempinski rates online start around 235 Euros for an overnight stay but I can assure you that my family would never pay that! (My parents won't stay offsite at MUC, and stay at the Kempinski, and are a little cheap....)

I do recall that last year during World Cup I considered a stay there and the price was only around 150 Euros; don't know if they have much lower weekend and/or last minute rates, but I thought that was a good price.

The ultimate factor for me would be if DEL is your final destination in India. If so, a nap might not be as vital. But then again, flying in LH Economy is torture, and even with a C seat I would take a rest in the middle of the trip before stocking up at the Edeka at MUC before the onward journey.