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Rear a/c blower on 2002 Mercedes-Benz ML500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
the rear blower on my ml will run sometimes when the ignition switch is off, also it will run for very short periods an cycle on and off??
(1) Answer
sounds like a sticking relay, find the relay/fuse center & tap the blower motor relay when it is running with the key off. if it turns off replace your relay. there could be many other problems but this is simple & easy to test.