Engine Cleaning; Car Washing; Window Cleaning, Wiper Blades; Headlamp Cleaning System - Mercedes-Benz 420 SEL 1989 Owner's Manual

Engine Cleaning

Corrosion protection, such as MB
Anticorrosion Wax should be applied
to the engine compartment after every
engine cleaning. Before applying, all
control linkage bushing should be lub­
ricated. The V-belt and all pulleys
should be protected from any wax.

Car Washing

Before washing your vehicle, remove
insect residues. MB Insect Remover is
recommended. Do not use hot water
or wash your car in direct sunlight.
Use only a mild car wash detergent,
such as MB Autoshampoo.
Thoroughly spray the car with a
diffused jet of water. Direct only a
very weak spray towards the ventila­
tion intake. Use plenty of water and
rinse the sponge and chamois fre­
quently.
Rinse with clear water and thoroughly
wipe dry with a chamois. Do not allow
cleaning agents to dry on the finish.
If the vehicle has been run through an
automatic car wash - in particular one
of the older installations - rewipe the
recessed sections in the taillamps
(designed to prevent soiling) if neces­
sary. No solvents (fuels, thinners etc.)
must be used.
94
In the winter, thoroughly remove all
traces of road salt as soon as pos­
sible.
When washing the underbody, do not
forget to clean the inner sides of the
wheels.
Tar Stains
Quickly remove tar stains before they
dry and become more difficult to re­
move. MB Tar Remover is recommen­
ded.

Window Cleaning, Wiper Blades

Use a window cleaning solution on
very dirty or oil-stained windows.
Clean the wiper blade rubber with a
clean cloth and detergent solution.
Replace blades twice a year; once
before and once after winter.

Headlamp Cleaning System

The condition of the wiper blades is
important for satisfactory cleaning of
the headlamp lenses. We therefore re­
commend that the blades be inspec­
ted regularly.
Replace damaged wiper blades.
Plastic Parts, Headliner
and Rubber Parts
Do not use oil or wax on these parts.
Seat Belts
The webbing must not be treated with
chemical cleaning agents. Use only
clear, lukewarm water and soap. Do
not dry the webbing at temperatures
above 80 °C (176 °F) or in direct sun­
light. Never bleach or re-dye the web­
bing as this may severely weaken the
belts.
Instrument Cluster
Use a gentle dish-washing detergent
or mild detergent for delicate fabrics
as a washing solution. Wipe with a
cloth moistened in lukewarm solution.
Do not use scouring agents.
Steering Wheel and
Selector Lever
Wipe with a damp cloth and dry
throughly or clean with MB Leather
Cleaner.