Mercedes B Class Parts & Spares

Fitment guides, buying advice and live UK eBay prices for the Mercedes B Class — always confirm against your reg or VIN.

The Mercedes B Class is a familiar sight on UK roads, which is good news when something needs replacing: parts are plentiful and prices stay competitive. Owners search most often for headlight, turbo and alternator — but the model spans different engines, trims and, on most generations, a mid-life facelift, so the same-looking part isn't always the right one.

Use the guides below to match a part to your exact Mercedes-Benz, then check live prices from trusted UK eBay sellers. Every part page lists what to confirm before you buy, so you avoid the classic wrong-part return.

Most-searched Mercedes B Class parts

HeadlightView prices ›

Check halogen vs xenon AND left/right (driver/passenger). Pre-facelift and facelift lenses differ — match your reg.

TurboView prices ›

Turbo part numbers are engine-code specific. Confirm the exact code stamped on your old unit where possible.

AlternatorView prices ›

Match the amp rating and pulley type (clutch vs solid). Stop/start cars often need a specific unit.

Brake PadsView prices ›

Front and rear are different sizes; some trims (GTI/R/sport) run bigger brakes with their own pad. Match your caliper, not just the model.

ExhaustView prices ›

Systems are usually sold in sections (front pipe, centre, back box) — confirm which section(s) you need and whether your car has a single or twin exit.

GearboxView prices ›

Manual vs DSG and the exact gearbox code must match — DSG (DQ250/DQ200) parts are not interchangeable.

How to check a part fits your Mercedes B Class

The same Mercedes-Benz can be sold with several engines and trims, and most generations get a mid-life facelift that changes lights, bumpers and trim. Before you buy:

Enter your registration to filter out the obvious mismatches.
Match your engine code for anything attached to the engine.
Check your trim — sportier versions often use bigger brakes and specific parts.
Confirm pre-facelift vs facelift if your car sits near the changeover year.
Best of all, match the part number on the unit you’re replacing.

Full walkthrough: how to check a part fits your exact car.

Buying Mercedes B Class parts: genuine, aftermarket or used

Genuine and OEM parts are the safe pick for safety-critical or hard-to-reach components and cars you’re keeping long term. For routine wear items, a reputable aftermarket brand is usually as good for far less. And for pricey assemblies on an older Mercedes B Class — alternators, starters, lights, panels — a well-rated used or reconditioned part can be the sensible choice. See OEM vs aftermarket vs used for the full rundown.

All Mercedes B Class parts

HeadlightMercedes B Class TurboMercedes B Class AlternatorMercedes B Class Brake PadsMercedes B Class ExhaustMercedes B Class GearboxMercedes B Class Starter MotorMercedes B Class Brake DiscsMercedes B Class Wing MirrorMercedes B Class Water PumpMercedes B Class Timing BeltMercedes B Class Timing ChainMercedes B Class Clutch KitMercedes B Class Dual Mass FlywheelMercedes B Class DPF FilterMercedes B Class EGR ValveMercedes B Class Wheel BearingMercedes B Class Shock AbsorberMercedes B Class Suspension ArmMercedes B Class Control ArmMercedes B Class WishboneMercedes B Class Brake CaliperMercedes B Class ABS SensorMercedes B Class Fuel InjectorMercedes B Class Fuel PumpMercedes B Class RadiatorMercedes B Class ThermostatMercedes B Class Coil PackMercedes B Class Glow PlugsMercedes B Class Spark PlugsMercedes B Class Catalytic ConverterMercedes B Class IntercoolerMercedes B Class Intake ManifoldMercedes B Class Drive ShaftMercedes B Class CV JointMercedes B Class Tail LightMercedes B Class Window RegulatorMercedes B Class Wiper MotorMercedes B Class Heater BlowerMercedes B Class Throttle BodyMercedes B Class Mass Air Flow SensorMercedes B Class Oxygen SensorMercedes B Class Crankshaft SensorMercedes B Class Oil PumpMercedes B Class Power Steering PumpMercedes B Class Engine MountMercedes B Class

Mercedes B Class parts — common questions

How do I know a part fits my Mercedes B Class?

Start with your registration to filter obvious mismatches, then confirm the details that matter: your engine code (for anything attached to the engine), your trim level, and whether your car is pre-facelift or facelift. The surest check is to match the part number stamped on the unit you're replacing.

Where's the best place to buy Mercedes B Class parts?

For most owners, eBay's UK sellers offer the widest choice and the keenest prices, covering genuine, aftermarket and used parts. Buy through eBay's checkout so you're covered by the Money Back Guarantee, and favour sellers with strong feedback and a clear returns policy.

Should I buy genuine Mercedes-Benz parts or aftermarket?

It depends on the part. Genuine or OEM makes sense for safety-critical or hard-to-reach components and cars you're keeping long term. For routine wear items — brakes, filters, suspension arms — a reputable aftermarket brand is usually as good for far less.

Are used Mercedes B Class parts safe to buy?

They can be a smart choice for expensive assemblies like alternators, starters, lights and body panels, especially on an older Mercedes B Class. Check the seller's feedback, confirm the part number matches, and prefer sellers who state condition and offer a returns window.