Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 11-20-2001, 12:59 AM
Zoonhollis's Avatar
Diesel Fanatic
Join Date: Jun 2000
Location: Cary, NC
Posts: 551
Sliding Roof Gearbox Query

After feeling all proud of myself for repairing my sunroof motor, I am now faced with a new problem of my own doing.

Correct me if I'm wrong, but the large gear (driven by the worm gear on the motor) is designed to turn feely on its shaft once the roof is fully opened or closed, or else the motor would wear a groove into the teeth of that gear. This appears to have happened in my case, presumably because I tightened the 17mm nut too tightly on the shaft on which the large gear rotates. There is a steel plate which contacts the smooth surface of the large gear, and friction from the locknut engages the gear until the roof stops, whereupon the gear can turn freely if the friction is not too great. It was too great in my case...

Does this sound right? Is there a cryptic torque spec for this nut, or is it trial and error?

Instead of haunting the salvage yards for another gear, I was able to rebuild it using the amazing versatility of JB-Weld and tooling the damaged teeth (about 30% of the total) to match the others. We'll see...

1995 E300 Diesel (Die Blau Frau)
Reply With Quote
Old 11-20-2001, 06:04 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
This is supposed to work as a "clutch" , it should be able to slip under extreme pressure.
At dealer we set up the clutch by allowing the motor to draw approx 10AMP(max) when at full open position. AT that point the clutch will slip. This is done with 17mm jam nut & large screwdriver.

MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
190E Sliding Roof Doesn't Work! Benz84 Tech Help 0 10-08-2002 11:15 PM
Sliding roof problem bryantmt Tech Help 1 08-25-2001 08:45 AM
94 C280: Sliding roof cannot be closed... hancheng Tech Help 5 08-30-2000 10:53 PM

All times are GMT -4. The time now is 09:26 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page