PeachParts Mercedes-Benz Forum - View Single Post

pwjeep · #5 09-19-2012, 07:08 PM

A strong, willing and careful partner is required. Step 1: Remove the upper C pillar panels to remove the heated rear window contacts. (you need both sides removed to aid installation) Step 2) One can remove the rear window carefully by cutting the old weather seal carefully. This can be done from the inside as well as the outside of the car. Remove the chrome trim very carefully as it needs to be placed back in the next weather seal as an integral part of the locking assembly. Don't bend any of the Chrome! Usually the weather seal is as hard as a rock and it takes a steady and careful hand to remove the glass. Then you place the glass (outside of glass) on a blanket on the roof. Step 3) Next you aggressively scrape the old hardened rubber from the flange and repair it if necessary. Step 4) Clean any rubber or other residue from the glass carefully!

Installation is tricky but easily possible with a strong and careful partner. (Setting the glass on a blanket on the trunk - outside of glass down) Step 1) Install the rubber to the glass (after you have cleaned the glass perimeter inside and outside edge with a solvent - Caution should be used NOT to get any solvent on the heated rear window grid.). Step 2) Install a rope (1/8" nylon rope is good) around the inner perimeter channel seal of the rubber. Overlap the rope about 1/2 way on the bottom side of the window seal. Leave about 2 ft of rope hanging out of the channel on each side. Step 3) Flip the glass so the outside of the glass is up. Install the chrome trim to the rubber which is on the glass. Step 4) Use liquid soap as a lubricant as it will wash away and leave no residue. Liberally Soap the flange and the rubber before you insert it into the opening. (Caution: soap makes the glass assembly slippery) Step 5) With an assistant place the assembled glass / weather seal / chrome trim / rope assembly in the cleaned window opening and press inward... carefully. Make sure the rope ends are inside the car. Step 6) One person goes inside and obtains the rope ends and wraps them around their hands (several times). (Opposite side rope in opposite side hand... right side rope in left hand, left side rope in right hand) Step 7) With the outside person pushing inward, the inside person pulls the rope toward themself... Both sides at the same time crossing your hands / arms. This will pull the seal over the inside lip of the window opening. Then after you have it started you pull one side and then the other until you have all of the rope extracted from the top of the window (center) and the rubber over the flange.

Note: You might have to remove the assembly and reinstall the rope and chrome and do it multiple times before the process is complete. Your partner should press in the corners and sides while you are pulling the rope to help make sure the window assembly pops in place.

Step 8) Take a dull hook tool and go around the finished seal from the inside to ensure that it is over (inside) the window channel lip. Step 9) Reinstall heated window wires and the C post panels.

Note: Make sure you have the proper weatherseal for the car. A W126 seal is too big for a W123 and so forth. There is no need to remove the package tray or the headliner for the rear window weatherseal replacement.