The odometer and trip odometer have stopped working on my '89 300CE. I'm assuming that the odometer gear is broken. What size gear do I need as a replacement? I found the following site that sells gears but there are quite a few options.

http://www.odometergears.com/mercedes.html

I would also like to replace the instrument panel bulbs. How many bulbs are there and what style/wattage of bulbs will I need?

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1989 300CE