Mercedes-Benz W210 boost pressure missing or turbo whining
The W210 turbo lacks power or the car goes into limp mode - what causes the loss of boost pressure?
Usually charge air is leaking: a pipe has come off, a pipe or clamp does not seal well enough, or the intercooler has torn internally. The leak is not always audible or visible from the outside. Find the leak before replacing the turbo.
How is a W210 boost pressure leak found?
A small amount of pressure with smoke is fed into the system, and you see where it escapes. Boost pressure should also be measured with a pressure gauge or read from the fault memory. By sealing the pipes and clamps, boost pressure rose from 1.3 bar to 1.4-1.5 bar in one car.
Which vacuum parts can cause a boost pressure fault in the W210?
The turbo vanes are controlled by a vacuum actuator, which is controlled by an electric vacuum regulator. A broken vacuum hose, a cracked rubber hose of the boost pressure sensor on the side of the intake manifold, a leaking diaphragm or the vacuum pump upset the operation. Check all hoses and connections.