I have a 1993 300CE I bought about 15 years ago. The wiper was sluggish when I bought so I took it apart and cleaned out the old grease. At that time (60,000 miles ago) The half moon gear was cracked in half. The crack went all the way thru. The teeth were fine and It looked solid so I just cleaned and re-lubed everything and it's been fine since. Lat year it started to slow down at the top and act eratic, so I thought the gear finally gave up.

I ordered the replacement from ********.com for about #35. It is the Dorman part number 924-389 that everybody seams to be selling on ebay. It's a nice high quality piece that's made in the USA. Unfortunately it's not correct for the 93 300CE. There are about half as many teeth as the original and it has 6 holes around the outside. Thank goodness I didn't break the cracked one trying to take it out. I never did figure out how to get it out without breaking anything.

The Odometer Gear replacement the PeachParts has looks like the Doman without the outside holes but with the course teeth.

I guess I'm just going to clean it and put it back together. Is there another gear available with the correct fine teeth?

Thanks! Great Forum!

If you can find an '86 124ch in the junkyard it will have a metal gear in the wiper.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Just to follow up, the wiper now works great. I'd forgotten what an impressive piece of engineering it is. The gear is still cracked in half, but it's been that way for the 15 years I've owned it so maybe it will outlive me.

I just took my time and carefully cleaned and lubed everything with WD40 to loosen it up and a synthetic red grease or ATF for lubrication. The daily drivers sit outside and we have a lot of trees that drop all sorts of crap in the spring. I couldn't believe how much crap had gotten into everything. It was packed between the wiper transmission and the windshield.

Anyway I also replaced the blade with the best one I could find and it works perfect. Absolutely smooth and silent

So don't panic if your wiper slows down or starts to stick at the top of the travel. A careful cleaning and lubing may be all that's needed!