koumartzis

Hello all,

does anyone know the differences between the motors (engines) of GLB 180d, 200d and 220d?

Do they have a different type of turbo charger, different air flow intake system or just a different ECU mapping?

All these types of model have the OM654q DE 20 motor.

ninjutzu

You're right, all the GLB models you mentioned (180d, 200d, and 220d) use the same engine - the OM654q DE 20. The key differences in their performance likely come down to ECU (Engine Control Unit) mapping.

Here's a breakdown of the possibilities:

• ECU Mapping: This is the most likely explanation. By adjusting the ECU mapping, Mercedes can alter factors like fuel injection, ignition timing, and boost pressure from the turbocharger. This allows them to achieve different power outputs and torque levels for each model variant (180d, 200d, 220d) while using the same basic engine.
  
• Turbocharger: It's less likely, but there's a chance Mercedes might use slightly different turbochargers for these models. A different turbo could spool up faster or provide more boost at higher RPMs, affecting power delivery.
  
• Air Intake System: Even less likely is a difference in the air intake system. Having a more efficient intake system could provide a small power increase, but it's not a common way to differentiate engine trims.
  

If you're looking for confirmation, checking official Mercedes-Benz specifications or consulting a mechanic familiar with these models would be the best course of action. They can provide details on the exact power outputs and torque figures for each variant, along with any other potential differences.

I'm fairly certain about the ECU mapping being the primary differentiator, but there's always a chance for some nuance. Here's why:

• It's a common practice: Car manufacturers frequently use the same engine block with different ECU tunes to create a range of power outputs within a model lineup. It's a cost-effective way to offer options to buyers while maintaining some economies of scale.
  
• Limited evidence for other differences: There's little information readily available suggesting Mercedes equips the GLB 180d, 200d, and 220d with distinct turbochargers or air intake systems. These changes would be more complex and less common compared to ECU adjustments.
  

However, for absolute confirmation, it's always best to consult reliable sources:

• Official Mercedes-Benz Specifications: Check the official website or brochures for the GLB class. They should list the specific engine outputs (horsepower and torque) for each model variant (180d, 200d, 220d). This would strongly suggest ECU mapping as the key differentiator since the engine code (OM654q DE 20) remains the same.
  
• Technical Resources: Look for detailed articles or repair manuals that delve into the GLB's engine options. These resources might mention any variations in turbochargers or air intake systems for different models.
  
• Mercedes-Benz Dealer or Mechanic: Consulting a qualified professional familiar with these models can provide the most definitive answer. They might have access to internal service bulletins or specifications that shed light on any potential hardware differences.