Explanation of Test Results
General InformationChecklist
The following steps should always be carried out in the specified
order before working in the engine compartment :
Park the vehicle on a level and stable surface.
Depress and hold the brake pedal until the
engine has stopped.
Apply the handbrake firmly Braking, stopping
and p ...
Heel and Toe Wear
Heel-and-toe wear is step-like wear of individual tread
blocks, due to which an increased rolling noise can develop. The
heel-and-toe wear is caused by the uneven distortion of the
tread blocks in the contact patch. Heel-and-toe wear appears in
more extr ...
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as refrigerant.
The refrigerant employed is tetrafluoroethane R134a, which
bo ...