Quand je passe la valise de diagnostic sa m affiche aucune communication de la prise obd au calculateur donc impossible de passer le Diag

I have a 2004 Volkswagen Golf 5 with an automatic transmission. When I stop at a red light or while waiting in traffic with the transmission in Drive and the brake pedal pressed, the car starts vibrating. In addition, every 3 to 4 seconds there is a stronger shake or jerk. This only happens when the car is stopped. When I start driving, the vibration disappears.
Spark plugs and one ignition coil have already been replaced, but the problem is still present. There is no warning light on the dashboard.
What could be the cause?

Hi,
I drive a 2006 Volkswagen Golf 1.9 TDI with around 220,000 km.

Recently, I noticed two issues:

1. A blowing or whistling sound when accelerating and decelerating, which seems to come from underneath the car, possibly around the exhaust line or turbo.
2. A metallic rattling or ticking noise, especially noticeable at low RPMs.
Both noises are more noticeable when the engine is cold, but sometimes persist when hot. I haven’t experienced any significant power loss, and nothing shows up on the diagnostic scan (OBD/valise).
Could this be due to a leak in the exhaust system, a loose or damaged hose, turbo issues, or maybe injectors or valve lifters?

Thanks in advance for your help or similar experiences!

Transmission error light comes on and off intermittently. Connected to OBD, but could not catch codes. Codes do not show up in memory

Flushing spanner Singh appears on the dashboard on gear indicators and get stuck in gear two. The car will drive only in gear two and won't change gears but when you swith it off and start again the problem will disappear and comes back other times. When you stop also and drive off sometimes it shakes or hesitate before it goes but not every time. The changing of gears is not smooth also.