I'm new to the site and am looking for instructions on how to remove and rebuild the throttle body on my s420. I have Alldata's information, but it doesn't contain any directions on this repair. Thanks for your help - Craig
its pretty easy if your talented with a soldering iron, its just replacing some wires and recovering said wires with some thick heat resistant tubing. while its off you will want to replace the breather tube from the throttle body to the passenger side of the engine, your gonna need a new gasket for the throttle body as well.
I rewire ETAs 92-95 models. 96 and up are different and don't have problems with wiring anymore. If you hear grinding sounds your best bet is used ETA as they are not as expensive as pre 96 ones.
One other thing you can do is remove and open it. If there are apparent damage replace it. I rewired one ETA from France off sl500 real Brabus and it was all rusty inside, gears barely moved. After rewire I had to grease it up for good. Maybe you have same issue where you just need to grease it up a bit. Worth a try anyway.
I got the ETA off and removed the cover and throttle plate gear has two or three missing teeth. The gear appears to be permanently attached and can't be removed. Do you know if this gear can be replaced, or do I need to buy a replacement ETA - new or otherwise. I've attached a photo of the gear with missing teeth.
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