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Lion Yard Trading
Mercedes-Benz · Engine

Accessory drive belt

The single long belt driving the alternator, water pump, power steering, air-conditioning compressor and anything else on the front of the engine.

Also called serpentine belt, aux belt, poly-V belt.

How you know it is this

  • A squeal on start-up or on full steering lock
  • Cracks across the ribs, or missing chunks
  • A belt that has shredded — and with it, no charging, no steering assistance and no water pump

Worth knowing before you buy

  • When this belt goes, the water pump stops. Overheating follows within a few minutes.
  • Always with the tensioner. A new belt on a worn tensioner squeals and then throws itself off.
  • Note the routing before removal, or photograph it — some engines have a genuinely confusing run.
  • A squeal on lock is often the tensioner, not the belt.

What we need to quote it. The engine code, and whether the car has air conditioning (it changes the belt length). The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.

Belt, tensioner and idlersEngine mountsGearbox mountBreather / PCVVacuum pump and linesCovers and undertray
Mounts, belt and breather — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the mounts and ancillaries

All engine parts
Get in touch

Accessory drive belt for your Mercedes-Benz?

Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.

Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)