Plug in Dr Side of Trans

[usarover]

Good morning all! I owe the forum a few minutes to start a new OWNER'S THREAD since I finally have time to revive my 93 500E. She is spent boys and girls, but here we go! First question: What is this plug? Is it repairable or a replacement item? Which way should it be oriented? As I dropped my trans pan yesterday, it came out before I could even get eyes on it! That might explain a code or two...

 

[gsxr]

That is the transmission overload protection switch, it sends a signal to the EZL at high RPM to retard ignition slightly during WOT upshifts. If the switch is defective it can leak ATF, cause a slight hesitation at WOT shifts, and should store a fault code on the EZL.

The rubber boot is not sold separately by MB but an aftermarket supplier in Europe sells the boot for a crazy price. The connection is not keyed/polarized, it doesn't matter which way the 2 pins connect. If the wires broke off they can be re-soldered. It's part of the wiring harness for the transmission, which is NLA.

 

[gerryvz]

The overload protection switch is a source for external transmission fluid leaks. Replacing mine cured a persistent, but fairly small, transmission fluid leak that I had for some years.

See here for more information on replacement:

HOW-TO: Transmission Overload Protection Switch Removal | "HOW-TO" Tutorial Articles

MODERATOR'S NOTE: There is a supplemental HOW-TO guide for this job, located here. It is advised to read both the original and supplemental HOW-TO guides to best understand and achieve this job. Today, I attempted to replace the transmission overload protection switch, located on the left...

www.500eboard.co

 

[usarover]

Thank you Gents!

 

[500AMM]

Kurth Classic Autoparts, Germany

€45 incl. VAT + shipping

connector for overload protection switch

replaces the mostly defect original connector - 100% OE quality

www.kurth-classics-autoparts.de

 

[gsxr]

Kurth doesn't like the colonies.

 

[usarover]

Is this a case of, "If you have to ask, it costs too much!" LOL