One thing I learned long ago that especially appies here, is to never skimp on materials. This especially appies when the materials are a small portion of the cost of a large job and especially when the materials are rubber products.

We only use Mercedes parts when we build a transmission. That especially means the seal kit. There was a time when that wasn't the case and we had had a few comebacks specifically identified to reduced diameter seals particularly the servo lip seal and the nylon o-rings for 4th gear.

As pointed out the parts are inexpensive. We charge 17 hours labor for the whole job so whether the labor is free or it is 75% of the job, it sure pays to never go there again by using the best materials.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician