General notes

NOTE: Engine PCV heater installed according to equipment level!

The special-equipment cold-climate version (SA 842) is mandatory in various countries (standard in US and Canada).

NOTE: Protect the oxygen sensor's plug connection to prevent contamination from entering!

The oxygen sensor requires ambient air within its interior in order to operate. The ambient air enters the interior via the plug connection through the cable. For this reason it is important to guard the plug connection against contamination from substances such as wax and sealants. When malfunctions occur in the lambda closed-loop control system the oxygen sensor's plug connection should always be checked. If necessary, the plug connection must be cleaned. Avoid all contact between the plug connection and contact spray, cleaning agents and solvents, as these substances could destroy the oxygen sensor.

NOTE: Defective exhaust flap!

If the exhaust flap is defective the exhaust system will emit a hissing noise a high engine speeds when it is closed. If the exhaust flap is defective and partially open a humming noise will be generated at idle.