That is correct -- the E500s have an electronic speedometer.
The cluster should just come straight out. I use a pair of hooks made from clothes hangers as cluster pullers.
BTW, you will get the best answers pertaining to this model if you post your questions to the bulletin board over at
www.500ecstasy.com as that's where all of the 500E/E500 nuts hang out.
Cheers,
Gerry