500SEL (126.037) V8-5.0L (117.963) (1984)
Final Installation: Starting August 1981
d) Intake manifold gasket.
The cross-section of gasket had to be enlarged. When renewing the gasket make sure that the respectively valid gasket for the respective engine is
installed, The former gasket is still available in spare parts depot.
Start of series: August 1981
Engines without Air Injection:
On engines with ET cylinder heads. which have 4 bores for the air injection to the exhaust valve (arrow), the latter have to be sealed with aluminium
tapered plugs.
This ensures that no exhaust gas reaches the intake side via the bores (poor idle).