W213 Rear Brakes, Ignition left on or off?
Thread Starter
Senior Member
Joined: Feb 2014
Posts: 344
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From: NJ
E300-4matic
W213 Rear Brakes, Ignition left on or off?
I’m about to do a rear brake job on my W213. I would like to know if the ignition should be left on or off after it is placed in the “Fitting Position”. None of the videos really mention my question.
My thanks for all of your answers.
My thanks for all of your answers.
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
Off. A) you don't wanna drain the battery and B) you don't want the pistons to potentially move while working on it. It's been a while, but it may even instruct you in the instrument cluster to turn off the ignition once it has retracted the pistons. From what I remember, once you turn the ignition back on, the pistons automatically move back to their normal position, so leave it off until you are done.
Thread Starter
Senior Member
Joined: Feb 2014
Posts: 344
Likes: 71
From: NJ
E300-4matic
When to pump the rear brakes after turning off the fitting position
Off. A) you don't wanna drain the battery and B) you don't want the pistons to potentially move while working on it. It's been a while, but it may even instruct you in the instrument cluster to turn off the ignition once it has retracted the pistons. From what I remember, once you turn the ignition back on, the pistons automatically move back to their normal position, so leave it off until you are done.
Out Of Control!!
Joined: Nov 2018
Posts: 11,617
Likes: 5,445
From: San Francisco Bay Area
2019 C63CS
Thank you for your clear and concise answer to my previous question. After turning off the fitting position when the rear brake pads are replaced should the brakes be pumped then or after the car is started. I think they should be pumped before starting the car again but it’s obvious you know what you’re talking about on this subject. Again, thanks for your anticipated reply.
