Date registered: Aug 2002
Vehicle: '85 2.3-16 '99 C280 '11 GLK350
Location: Scottsdale, Arizona, USA
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I re-read my post and should note that you only have to undo the underdash panel on the driver's side.
Removing the air duct may seem dangerous, but being press fit into each end, it is literally a tug and pull operation. The flexible duct is wiggled out from under the dash.
When you're looking up at the back of the speedo, shine a light towards the center and you'll easily see the brass knurled fitting.
All the wire harnesses on the cluster are key coded, so you really can't plug one into the wrong location.
When handling the cluster, be careful about the solder joint that creates the "ground/earth" connection between the center and left modules. If you find that the left side (gas, engine temp, oil pressure) goes dead, it's quite likely that the joint was broken.
Finally, before re-assembly, go ahead and replace all the $1 light bulbs and then you'll be good to go for another 10 years.