How do you change the bulb that illuminates the speedometer on a 1999 320 E the light for the left side of the speedo is dim?

I bought the tool from a Mercedes dealership. it looks like 2 knitting needles with handles and hooks at the ends. First extend the steering wheel telescopic to full out position; then lower the steering column to allow clearance for the cluster to slide out. The hooks go into 2 little holes on the 2 upper corners of the speedo cluster. First keep the hook pointing up and slide it in as far as the mark on the tool shaft; then turn left or right accordingly towards the speedo cluster to feel some grip. Gently apply pressure from side to side and slide the speedometer cluster out. Be careful. It's then quite easy to change a bulb.