I just did mine on my 1999 S320. On the 140 chassis you are able to remove the drivers side vent and "push" the cluster out partially and then get your tools in. If your able to get it out a little you can do a lot with your fingers to pull the cluster out. While I had a set of "tools" nearby I did not need them at all. Just a push from one side to get it out and using my fingers to pull it out the rest of the way.

It takes a bit of patience but you will get it out. A bit of a suggestion though. Bulbs are cheap. Toss out the old ones and put a whole new set in. It does wonders for the brightness of your cluster. Old bulbs dim over time.