The older Auto Transmission Mount was torn to shreds along with a missing bolt and nut and any other parts such as split washer (if applicable), etc.


The new replacement Auto Transmission Mount 1242400618 has a bolt on top that goes inside the hole on the bottom of the TRANSMISSION CASE REAR 124 270 01 11. I am missing the nut that goes on the bolt. I believed it is a size 19mm nut. Can anyone tell me exactly what is needed to tighten the bolt with a nut? Is the nut a special type nut with the correct 19mm size along with other related parts that goes on the bolt from the top or bottom of the Transmission Rear Case such split washer, using thread locker, etc., to make sure the proper and/or correct tightening fitment? Anyone out there can share some insight into this? Thanks for reading.

Mercedes has a special tool that is really thin. You don’t need that. I took a cheapie 19mm wrench and grinded it down thinner so it’d fit in that small space. Worked ok got the job done

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

speednjay, thanks for your post. I just need what kind of nut, washers, and others if necessary to tighten transmission bolt on the rear case housing of the transmission.I lost them all. Anyone out there do know?

I found there 3 parts related to the transmission mount bolt that goes inside the transmission rear case housing:


308675012001 - Transmission Mount Nut - - Secures the transmission to the transmission mount -

1242420026 - Transmission Mount Shim - Located between the transmission and the transmission mount -

007349010007 - Washer - Located between the transmission cross member and the cross member bolt

Vehicle Fitment
Make Body & Trim Engine & Transmission
1993 Mercedes-Benz 300 CE Base 3.2L L6 - Gas
1992 Mercedes-Benz 300 CE Base 3.0L L6 - Gas
1991 Mercedes-Benz 300 CE Base 3.0L L6 - Gas
1990 Mercedes-Benz 300 CE Base 3.0L L6 - Gas
1989 Mercedes-Benz 300 CE Base 3.0L L6 - Gas
1988 Mercedes-Benz 300 CE Base 3.0L L6 - Gas
1995 Mercedes-Benz E 320 Base 3.2L L6 - Gas
1994 Mercedes-Benz E 320 Base 3.2L L6 - Gas