W203 window / trunk control unit
Thread Starter
Banned
Joined: Nov 2005
Posts: 447
Likes: 0
W203 window / trunk control unit
Here's the part number to replace the window control unit, on the driver's side door. It includes the trunk release as well.
Part
a 203 821 06 79 9116
I didn't find it in the forum thought I would post it.. To install it, you basically do the same as the grab handle install, except on the drivers side. And then do something with the unit..
Anyone installed this? I haven't yet...Can you post some help or a DIY??
THANKS
Part
a 203 821 06 79 9116
I didn't find it in the forum thought I would post it.. To install it, you basically do the same as the grab handle install, except on the drivers side. And then do something with the unit..
Anyone installed this? I haven't yet...Can you post some help or a DIY??
THANKS
Super Moderator Alumni
Joined: Mar 2004
Posts: 7,684
Likes: 12
From: West Los Angeles
Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
Here's the part number to replace the window control unit, on the driver's side door. It includes the trunk release as well.
Part
a 203 821 06 79 9116
I didn't find it in the forum thought I would post it.. To install it, you basically do the same as the grab handle install, except on the drivers side. And then do something with the unit..
Anyone installed this? I haven't yet...Can you post some help or a DIY??
THANKS
Part
a 203 821 06 79 9116
I didn't find it in the forum thought I would post it.. To install it, you basically do the same as the grab handle install, except on the drivers side. And then do something with the unit..
Anyone installed this? I haven't yet...Can you post some help or a DIY??
THANKS
Thread Starter
Banned
Joined: Nov 2005
Posts: 447
Likes: 0
the trunk release and the window control are in the same unit. My auto window down button broke, but it had 97k.. And it was the drivers window button as well... Probably the mostly used button.
When I disconnect the old unit, do I have to worry about setting off a dummy light with the computer?
When I disconnect the old unit, do I have to worry about setting off a dummy light with the computer?
Super Moderator Alumni
Joined: Mar 2004
Posts: 7,684
Likes: 12
From: West Los Angeles
Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
the trunk release and the window control are in the same unit. My auto window down button broke, but it had 97k.. And it was the drivers window button as well... Probably the mostly used button.
When I disconnect the old unit, do I have to worry about setting off a dummy light with the computer?
When I disconnect the old unit, do I have to worry about setting off a dummy light with the computer?
As for how the replacement would go, I'm not entirely sure about that.
Super Moderator Alumni
Joined: Mar 2004
Posts: 7,684
Likes: 12
From: West Los Angeles
Midnight Blue 2004.5 C230 Kompressor Sport Sedan. 2002 w210 E320, 2009 w211 E350 Sport
There are a few people who have taken the door assembly apart before, so hopefully they'll see this thread and chime in.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
8 Oddball Mercedes Ideas That Actually Made it to Production
Verdad Gallardo
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look
Verdad Gallardo
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Thread Starter
Banned
Joined: Nov 2005
Posts: 447
Likes: 0
great! i was guessing i would have to do that.. when I got my custom roof installed, they disconnected the sunroof switch.. Then when they went to plug it back it, it didn't automatically close itself with the auto button.. He asked me if it was automatic and I said yes, and then I asked him if he disconnected the switch.. He said yes, and I said it needed to be resynced... He started to say "well we aren't responsible" I said hold it, watch this....
Now I know a custom shop that doesn't back up their work.
Now I know a custom shop that doesn't back up their work.
Thread Starter
Banned
Joined: Nov 2005
Posts: 447
Likes: 0
i installed it, you dont have to remove the door panel, just get the clips on the bottom and right side of the door to come loose, undo the two handle bolts, the bolt under the SRS badge, and take off the tweeter housing and unscrew the lock pin. Take off the door hinge cover plate, located on the door in the middle on the left side, one torx.
Get the door loose, get under the car and look up into the door. YOu will see a white bracket, push towards the tweeter on that white piece, to unlock the unit from the bracket. The unit is plugged in up near where the door open handle is, but behind the foam in the door itself, not just in the door panel. Unplug, and switch them out. You might need a extension mirror to see wher eits plugged in, if not look at it from the dashboard towards the left side of the door, its a blue plug but you have to remove some thin foam to get to it. Its there, just look.
Refasten all of your torx, replace the door hinge cover, tighten the grab handle bolts, and replace the srs badge and tweeter housing.
Done!
Sorry no pics its pretty easy so i think you can handle it
Get the door loose, get under the car and look up into the door. YOu will see a white bracket, push towards the tweeter on that white piece, to unlock the unit from the bracket. The unit is plugged in up near where the door open handle is, but behind the foam in the door itself, not just in the door panel. Unplug, and switch them out. You might need a extension mirror to see wher eits plugged in, if not look at it from the dashboard towards the left side of the door, its a blue plug but you have to remove some thin foam to get to it. Its there, just look.
Refasten all of your torx, replace the door hinge cover, tighten the grab handle bolts, and replace the srs badge and tweeter housing.
Done!
Sorry no pics its pretty easy so i think you can handle it
Newbie
Joined: May 2009
Posts: 2
Likes: 0
C-230
Easy repair once you know how to start
I spent a couple dozen minutes poking around my door trying to figure out how to start on this, based on the above instructions, as I've not really done much work on my car, but I was damned if I was going to let the stealership squeeze my wallet anymore than I had to.
For those that are new to working with the door panel, I'll provide my step-by-step:
For those that are new to working with the door panel, I'll provide my step-by-step:
- Unscrew your lock post (Sirene called it a pin). You might also know this as the lock knob, ie. the golf-tee-shaped thingit that locks and unlocks your door manually.
- Pop the tweeter off the door. I started at the far right corner and worked it loose with a small screwdriver. Be gentle and you will be rewarded with a plastic "snap" that tells you that part of the housing as sprung free of one of the retaining brackets. (Or that you've busted your housing!
Did I mention be gentle?) - GENTLY pry the front part of the plastic housing off your grab handle. This is where a proper tool would have probably saved me some small marks on the plastic, but if you go slowly and GENTLY! you should be able to pry the front off the grab-part of the handle, exposing the 2 bolts that need to be removed.
- Use your Torx driver to remove the 2 bolts and put them somewhere safe (NO, not on the floor!
) - Using your fingernails (or something stiff like a plastic putty knife) pry the oval-shaped SRS badge off. It won't come completely off, as the clever MB engineers were probably tired of losing the damn thing on their prototypes, so they put a little retaining strap on it. Remove the torx bolt concealed within.
- Just to the left of that, look for a smaller, silver torx bolt holding a small plastic cover over the door latch. (Sirene called this the "hinge cover plate", and I spent like 10 minutes looking on the hinge-side of the door before I figured out that one.
) Unscrew that bolt and pull the plastic cover off the door. - Using something thin but strong, GENTLY pry the panel away from the door on the left, bottom and right sides. The object is to get the panel to pop loose from 5-6 retaining clips. These things look like white bolts that insert into round holes on the door frame. You'll know you've got it, when the entire panel swings free at the bottom.
- Get down underneath the door, and look up at the panel-side of the door. The unit you are wanting to replace will be underneath a rubbery black covering that is glued to the panel with some black, tar-like stuff. If you are careful, you should be able to pull that back without damaging the adhesive, exposing the part. Slide the white bracket up, freeing the unit from the retaining frame.
- Follow the wires from the unit to the doorframe side, where it will be plugged into a clip. There is a small, plastic nubbin that you will need to push in towards the wires that will release the plug from the housing. Look at your replacement part to get an idea of what you need to press, as it will be hard to see from your angle.
- Once the wire harness is unplugged, you should be able to pull the entire part down towards you, wiggling it free of the retaining bracket.
- Put your new part in place, plug in the wires, and TEST TO MAKE SURE IT WORKS! Don't you hate it when you get the whole thing back together and it doesn't work because you didn't QUITE seat the wire harness all the way?
- Assuming all is well, reverse the above to reassemble your door panel.
Junior Member
Joined: Jan 2011
Posts: 32
Likes: 0
From: Israel
2005 C200 CDI
Thanks modctek!
I followed your instructions to the letter and 25 minutes later (while taking my time) I had the new Master Switch installed and working.
This post saved me lots of $$$.
Great job!
I followed your instructions to the letter and 25 minutes later (while taking my time) I had the new Master Switch installed and working.
This post saved me lots of $$$.
Great job!
