"My wife and I were happily married for 70 years … We were always together as a couple. I have looked after my wife in the best possible way over the years."
The man said he was worried his wife would be taken to a care home as it became increasingly difficult to look after her alone.
Medically assisted suicide is not illegal in Germany, thanks in part to a group of doctors and patients who sued to change the criminal law that had banned it.
The New York Times reports that Germany's highest court overturned a ban in February this year that means terminally ill patients can seek help to end their lives without having to travel overseas.
"The rule is not compatible with the basic law and thus void," said Judge Andreas Vosskuhle, the president of the eight-member Federal Constitutional Court, in February.
He deemed the right to die "includes the freedom to take one's life and to rely on the voluntary help of another person".
Where to get help:
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• Depression helpline: 0800 111 757 (available 24/7)
• Rainbow Youth: (09) 376 4155
• Samaritans 0800 726 666
• If it is an emergency and you feel like you or someone else is at risk, call 111.
