Marvel Comics continuity
When the Decepticons allied with Cobra, Dirge was assigned to be an emissary among the humans. This would be unfortunate for the luckless Seeker. When Serpentor realized the Decepticons were going to destroy the Earth, he needed a token of conciliation to show the Autobots. So in the middle of a battle against Omega Supreme, Serpentor goaded Dirge into attacking the giant with everything he had. Serpentor then pressed a button in the cockpit of his own jet, "jamming" Dirge's "frequencies," which caused the Seeker's weapons to lock up and explode when he tried to fire.
The explosion tore Dirge apart, and he wouldn't be seen again for years.
Devil's Due G.I. Joe vs the Transformers continuity
Dirge appeared in G.I. Joe vs. the Transformers II with Thrust, Ramjet, Scourge and Cyclonus, acting as bodyguards for Shockwave. Dirge was presumably killed either when the Dinobots appeared, or when Cobra Commander detonated a store of explosives inside Starscream, killing everyone present. In this story, Dirge had not received an Earthen mode and transformed into a Cybertronian jet.
- Dirge - article in the Transformers wiki.