If you're asking about disabling the speed limiter function in your Mercedes while keeping the cruise control active, the process is straightforward. In GCC-spec models common in the UAE, like the 2023 Mercedes-Benz C300 or GLS 450, you typically push the cruise control stalk on the left side of the steering column forward once to deactivate the limiter, then press the end button inward to switch it back to standard adaptive cruise control. This is useful for overtaking on highways like the Dubai-Abu Dhabi E11 road, but remember that MOI UAE speed limits (e.g., 140 km/h on certain highways, 120 km/h on others) are strictly enforced with radar. Relying on cruise control on long, straight desert highways can reduce driver fatigue, but the system's frequent deactivation in Dubai-Sharjah rush-hour traffic makes it less effective there. From a total cost of ownership (TCO) perspective, consistent highway driving at a controlled 120 km/h using cruise control in a Mercedes GLE 450 can improve fuel economy by roughly 1-1.5 km/l compared to variable aggressive driving, saving about AED 1,200-1,800 annually on Special 95 fuel for a driver covering 25,000 km per year.
- Fuel type impact: Using Super 98 can result in slightly smoother acceleration response when the system reactivates after braking.
- System limitations: The radar-based system may disengage in heavy sand or dust, requiring manual override.
- Ownership cost: Annual depreciation for popular Mercedes models in the UAE ranges from 15-20%, making cruise control a minor factor in resale value compared to full service history.
The primary authority on road safety and vehicle equipment compliance is the RTA Dubai, which mandates that all driver assistance systems function as intended during vehicle testing. Furthermore, traffic regulations and enforcement are under the purview of the MOI UAE, which does not differentiate between manual driving and assisted driving regarding speed limit violations. Therefore, the legal and financial responsibility for maintaining the set speed always rests with the driver, regardless of the vehicle's assistance systems.
