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The diaphragm in the PCV may have become rigid, which is a frequent occurrence and can be substituted; however, it is still necessary to seal it off to conduct a smoke test on the boost system. Should the PCV require substitution, it could result in uneven idling and permit oil to enter the intake.

Boost leaks transpire solely post-turbo; the smoke will follow the path of least resistance, thus if there is an alternative route before reaching the turbo, it will not enter the boost system. It is essential to inspect the pipes following the turbo, intercooler, and inlet manifold to ensure that ...

You must detach the PCV from the intake pipe and seal the opening, or else the crankcase will become inundated with smoke.

A 2016 250d descended in 100-mile increments. My fuel mileage and AdBlue records showed an interesting trend: on my frequent long runs, the full tank reading of 7,000 miles only decreased by 100 miles for every 300 miles covered.
At the local Esso station, I simply added more AdBlue and filled up ...

Could you kindly elaborate on the procedure to link your music through Wi-Fi? I appreciate it.

The system is identical in my 2026 CX-30; however, I am still adjusting to it all. My main complaint is that, while using MRCC, some moron cuts in front of you, and I have to wait for that brief moment of the car hard braking. Unfortunately, there is no way to prevent this.
Although RCTA and FCTA ...

Certainly, your Mercedes technician who performed the service possesses Star diagnostics and can examine the vehicle for fault codes at a reduced expense compared to the authorised dealer?

A thorough diagnostic examination of the vehicle is necessary.

Best wishes

It may be advisable to visit the dealer to purchase the bolt and plastic trim. Verify with the dealer.