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 02-13-2006, 11:37 PM
Registered User
Join Date: Aug 2005
Location: Palmdale/Ventura, CA
Posts: 813
How to extend life of rubber and boots and dash ?

I read a really interesting thread on keeping the dashboard alive and supple and unsplit. The conclusion was it cracks because it dries out.

So, who has suggestions for keeping axle boots from cracking and splitting ?

It seems the longer we can keep the boots from splitting open, the longer
we can drive on our axles.

I am about to install a complete rear end from a car with only 100K miles
into my almost 300K car. The boots are not split and it seems I could
do something to them to help them out.

80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250
Reply With Quote
Old 02-13-2006, 11:59 PM
wbain5280's Avatar
Registered User
Join Date: May 2001
Location: Northern Va.
Posts: 3,386
Silicone spray will keep all the rubber bits, boots, door seals etc, soft and supple. It's been mentioned here that Aerospace 303 protectant will take care of the dash.


Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL


Not part of the in-crowd since 1952.
Reply With Quote
Old 02-14-2006, 01:24 AM
Registered User
Join Date: Mar 2003
Location: Southern California
Posts: 2,203
Pledge furniture polish for the dash pad. It's carnuba wax in a petroleum distillate emulsion. The carnuba seals up the vinyl and lowers the rate of outgassing that eventually shrinks the skin, which causes stresses to built until it splits.

"New car smell" is merely vinyl outgassing, which is when the shrinkage and stress buildup starts, and heat an UV from the sun accelerates it. Keep the car covered in the sun or at least use a windshield shade.

Not sure about the CV boots. They don't see UV light (ultra enemy to organic materials), but are continuously flexed, while the car is moving. Silicone spray is probably a good as anything, but it will only protect the outside surface from various contaminants. It won't protect against fatigue from flexing. In any event, split CV boots seem to be fairly rare. I can't remember a report on this forum.

Reply With Quote
Old 02-14-2006, 09:49 AM
Registered User
Join Date: Jul 2005
Location: Eastern Panhandle, WV
Posts: 43
I will second the use of "303 Protectant". It is supposed to be a good preservative for everything. I have seen cautions against the use of some silicone sprays, saying that there may be other substances in the propellant that will harm the surface. If the propellant is inert, silicone will be OK but perhaps the "303 Protectant" will form a better barrier that will repel other substances and prevent the loss of vital juices. It's not cheap.
I have also successfully used the Mequires white/watery substance for inside the car. Until it cures, it is very susceptible to water, causing streaking. May not be the best to use under the car!
Reply With Quote
Old 02-14-2006, 06:34 PM
Registered User
Join Date: Sep 2005
Posts: 231

Avoid any dash or vinyl product solutions with alcohol in them; the alcohol damages the dash/upholstery over time - dries out the natural oils in the plastic or rubber...

Reply With Quote
Old 02-14-2006, 06:59 PM
Registered User
Join Date: Jan 2002
Posts: 177
Who sells this 303 Protectant?
I've read that certain dash colors are more prone to cracking than others.
From experience with the 107 cars I've noticed that the 350sl's and 450sl's were manufactured with dash colors coordinated with their interior colors.
I have a 1977 450sl with a brown dash - cracked.
1979 450slc with a blue dash - cracked.
1985 280sl with a black dash- cracked.
1972 350sl with a palimino dash - in perfect condition.
I know that Mercedes went to all black dashes in the 107 cars in the 1980's but did they change their material(plastic composition) in the early 1970's?
I've noticed other early 107's with perfect original dashes but hardly any later ones?

72 350SL #69
73 450SL Parts Car?
78 450sl Parts Car
79 450SLC - Sold
1985 280sl
87 190E 2.6 - Donated
90 300E-Junked
97 E420
Reply With Quote
Old 02-14-2006, 07:16 PM
Mike Murrell's Avatar
Registered User
Join Date: Feb 2000
Posts: 2,580
Chemicals can help preserve the dash - so can one of those expandable window covers that you put up after stopping the car - keeps the sun out.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
Reply With Quote
Old 02-14-2006, 10:24 PM
Ether's Avatar
Go S Class or go home
Join Date: Oct 2001
Location: Lawrenceville, GA
Posts: 758
Originally Posted by knarf
Who sells this 303 Protectant?

I picked some up at West Marine this past weekend.

1980 300SD - 495k miles - 'The Ambassador'

Former Family Members
95 C280
73 280SEL
90 300D
87 300SDL (X2)
86 560SEL
84 300D
80 300SD

Reply With Quote
Old 02-14-2006, 10:29 PM
glenmore's Avatar
Registered User
Join Date: Sep 2002
Location: Los Angeles
Posts: 963
Originally Posted by knarf
Who sells this 303 Protectant?

Always some on ebay.

1991 300CE
2000 C280
1990 LS400

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

All times are GMT -4. The time now is 09:44 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page