Z.ai GLM-5:
You should **drive**.
Here is why:
1. **Logic:** You cannot wash your car if you leave it behind. Walking there would mean arriving at the car wash without the object you intend to clean.
2. **Efficiency:** While 50 meters is a very short distance (about half a football field), driving takes the car directly to the cleaning equipment.
**Tip:** Since 50 meters is a very short trip, try to avoid turning the engine off immediately upon arrival if the engine was cold; short trips without warm-up time can be slightly harder on the engine over the long term. However, for the sake of the task, driving is the only option that makes sense.