Make your own
Brother of The Benz, AV
I too have a 300E, some what older than yours, mine is a '87.
I as so many have made our own "Cluster Hooks".
It's quite complicated, so I'll walk you through it slowly.
Obtain a length of welding wire, typically 36"OAL by 0.045 or 0.060 inch in diameter.
Cut two lenghts that when placed at the cluster will clear the steering wheel.
At one end bend a 90 degree hook approximately 1/8".
At the opposite end bend 90 degree the length to fit your palm.
Disconnect the negative battery cable, you know the one with the - sign.
The proper technique using your hands only is to pull the cluster out(to the rear)as far as possible before using the fancy smancy hooks.
Next insert the hooks at about 10 and 2 o'clock position and rotate 90 degrees for the small hook to catch the cluster.
Now gently pull and the cluster will follow.
Reaching behind the cluster, unplug the amphenal plug and the vac line to the econo- gauge.
Pull the cluster out and up to the right affording room to reach the speedo cable; un-screw it from the cluster.
You may have to push the speedo-cable up from the firewall for slack to reach the nut for unsrewing.
That's about all there is to it, you've just soloed cluster removal.
Please don't take my humor personally.
Happy Trails Beep Beep from The Spiderman in Houston!!!