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spongebob squarepants
Zolder


Joined: 20 Dec 2009
Posts: 5595
Location: Manchester and Iraq


PostPosted: Tue Sep 10, 2019 7:56 pm    Post subject: Mercedes W205 rear piston calliper wind in Reply with quote

Stupidly thought I’ll do rear pads on Merc, hrs job I’m thinking! So first procedure is to get to the fitting position, by holding phone/ok buttons brings up menu for brake pad replace my with parking brake off which retracts the pistons into the supposed fitting position.

These are the callipers with the electronic hbrake attached.

So all good but still miles off enough space for the new pads to fit, no matter what I do, turning clockwise pushing I can’t get them to retract anymore frustrated Dont know Confused I can’t find any specific tool that looks like it will fit, anyone any ideas?.
_________________
991 C2S PDK with X51 430 powerkit in racing yellow, PCCB, PDCC, PSE, Carrera S alloys, Sports design package with ducktail.
“Herman yellow, the last of the naturally aspirated”

EX 997.2 Carrera 4S PDK
EX 997.2 Carrera S PDK
EX 993 C2 manual in guards red
EX 997 C2 gen 2 PDK
EX 993 Targa
EX 993 Carrera 4 manual
EX 996 3.4 Cabriolet

Racing Yellow, there really is no substitute
 
  
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kurlykris
Magny-Cours


Joined: 30 Jun 2014
Posts: 2512
Location: Warwickshire


PostPosted: Tue Sep 10, 2019 8:32 pm    Post subject: Reply with quote

According to a bit of googling, the EPB retract procedure only releases the tension on the parking brake motors, you have to manually wind the pistons back into the calipers.

"Open the calipers
Using the SPi diagnostic tool or manufacturer-specific EPB tool, connect to the vehicle’s DLC. Depending on which tool the technician is using, select EPB through the menu and press the ‘OPEN’ calipers option. This electronically relaxes the handbrake mechanism but does not ‘wind’ the pistons back. The user will hear the EPB motor retracting and, once relaxed, the worn pads can be removed and manual ‘wind back’ can occur (the EPB tool does not need to be connected during the mechanical process of this procedure)."

Hope this helps, it`s about all I could find Thumb
_________________
1998 996.1 C2 3.4 with "Aerokit Cup"
2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport

 
  
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spongebob squarepants
Zolder


Joined: 20 Dec 2009
Posts: 5595
Location: Manchester and Iraq


PostPosted: Tue Sep 10, 2019 8:53 pm    Post subject: Reply with quote

kurlykris wrote:
According to a bit of googling, the EPB retract procedure only releases the tension on the parking brake motors, you have to manually wind the pistons back into the calipers.

"Open the calipers
Using the SPi diagnostic tool or manufacturer-specific EPB tool, connect to the vehicle’s DLC. Depending on which tool the technician is using, select EPB through the menu and press the ‘OPEN’ calipers option. This electronically relaxes the handbrake mechanism but does not ‘wind’ the pistons back. The user will hear the EPB motor retracting and, once relaxed, the worn pads can be removed and manual ‘wind back’ can occur (the EPB tool does not need to be connected during the mechanical process of this procedure)."

Hope this helps, it`s about all I could find Thumb


Yep but it’s the manual wind back bit I can’t get to happen nooo
_________________
991 C2S PDK with X51 430 powerkit in racing yellow, PCCB, PDCC, PSE, Carrera S alloys, Sports design package with ducktail.
“Herman yellow, the last of the naturally aspirated”

EX 997.2 Carrera 4S PDK
EX 997.2 Carrera S PDK
EX 993 C2 manual in guards red
EX 997 C2 gen 2 PDK
EX 993 Targa
EX 993 Carrera 4 manual
EX 996 3.4 Cabriolet

Racing Yellow, there really is no substitute
 
  
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kurlykris
Magny-Cours


Joined: 30 Jun 2014
Posts: 2512
Location: Warwickshire


PostPosted: Tue Sep 10, 2019 8:58 pm    Post subject: Reply with quote

Have you tried asking on the MBclub.co.uk forum, they are normally quite a good bunch of guys, a bit like here on 911uk Grin

I can ask the guys who service mine if they know, I don`t have the EPB though Thumb
_________________
1998 996.1 C2 3.4 with "Aerokit Cup"
2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport

 
  
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spongebob squarepants
Zolder


Joined: 20 Dec 2009
Posts: 5595
Location: Manchester and Iraq


PostPosted: Tue Sep 10, 2019 9:04 pm    Post subject: Reply with quote

kurlykris wrote:
Have you tried asking on the MBclub.co.uk forum, they are normally quite a good bunch of guys, a bit like here on 911uk Grin

I can ask the guys who service mine if they know, I don`t have the EPB though Thumb


Just joined and asked the question Grin
_________________
991 C2S PDK with X51 430 powerkit in racing yellow, PCCB, PDCC, PSE, Carrera S alloys, Sports design package with ducktail.
“Herman yellow, the last of the naturally aspirated”

EX 997.2 Carrera 4S PDK
EX 997.2 Carrera S PDK
EX 993 C2 manual in guards red
EX 997 C2 gen 2 PDK
EX 993 Targa
EX 993 Carrera 4 manual
EX 996 3.4 Cabriolet

Racing Yellow, there really is no substitute
 
  
View user's profile Send private message Visit poster's website
   
jonboy
Spa-Francorchamps


Joined: 30 Dec 2012
Posts: 345
Location: Midlands


PostPosted: Tue Sep 10, 2019 10:04 pm    Post subject: Reply with quote

I’d be interested in knowing the answers if you get one
_________________
997TT with PCCB
 
  
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HSC911
Long Beach


Joined: 23 Jul 2014
Posts: 6569
Location: Bedford


PostPosted: Tue Sep 10, 2019 10:07 pm    Post subject: Reply with quote

spongebob squarepants wrote:
kurlykris wrote:
Have you tried asking on the MBclub.co.uk forum, they are normally quite a good bunch of guys, a bit like here on 911uk Grin

I can ask the guys who service mine if they know, I don`t have the EPB though Thumb


Just joined and asked the question Grin


Try and sell a number plate on there too just for a laugh Grin

Thumb
 
  
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spongebob squarepants
Zolder


Joined: 20 Dec 2009
Posts: 5595
Location: Manchester and Iraq


PostPosted: Wed Sep 11, 2019 6:40 pm    Post subject: Reply with quote

I just took the so**ing callipers off in the end, pushed in easily once removed, just refitted and bled, brakes brilliant now, those pads were low Embarassed
_________________
991 C2S PDK with X51 430 powerkit in racing yellow, PCCB, PDCC, PSE, Carrera S alloys, Sports design package with ducktail.
“Herman yellow, the last of the naturally aspirated”

EX 997.2 Carrera 4S PDK
EX 997.2 Carrera S PDK
EX 993 C2 manual in guards red
EX 997 C2 gen 2 PDK
EX 993 Targa
EX 993 Carrera 4 manual
EX 996 3.4 Cabriolet

Racing Yellow, there really is no substitute
 
  
View user's profile Send private message Visit poster's website
   
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