be careful with ether, I have heard that it can melt the glow plugs so you can never get them out.

I cant get my block heater plug out, and I tried really hard. It wasnt worth it to me to run the block.

But what do you have ak300Td for these, what brands, where did you get them? I am mostly interested in the battery pad heater, I have never seen that.

block heater
battery pad heater
engine oil pan heater

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.