Poly-V-belt drive M57 E38/E39
• Maintenance-free
• Automatic retensioning (concept based on M47)
• Two belt levels
Rear: Water pump, power steering pump,
Alternator
Front: A/C compressor
Poly-V-belt drive M67
• Maintenance-free
• Self-retensioning
• Two belt levels
Rear: A/C compressor, power steering pump
Front: Alternator, water pump
Tensioning pulley or idler pulley
The tensioning pulley is designed as a spring-loaded element, thus rendering the hydraulic connection (M47) unnecessary.
The idler pulley arranged on the alternator ensures the belt drive runs more smoothly.
