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Mercedes-Benz B Class buying guide (Ireland, 2026)

What a used Mercedes-Benz B Class costs in Ireland, how it does at the NCT, what goes wrong and what it costs to fix. Based on 140 for sale right now.

Used Mercedes-Benz B Class prices by year

Typical asking price by registration year, and typical mileage. Private sellers usually take 5–10% less than asking; expect dealers to be a little dearer.

Mercedes-Benz B Class NCT pass rate

How often Mercedes-Benz B Classes pass their NCT first time, against all cars the same age (Road Safety Authority (RSA), NCT make & model data 2025, initial tests).

Most common reasons a 2017 Mercedes-Benz B Class fails: steering & suspension (6.8% of tests), wheel alignment (5.8% of tests), wheels & tyres (5.4% of tests), lights & electrics (4.4% of tests).

Common Mercedes-Benz B Class problems

Known weak spots to check before you buy, with typical Irish garage costs if the problem is there.

Engines and how long they last

2.0 Diesel: usual problem: injector seals and timing chain on 2.1 CDI.

1.5 Diesel: usual problem: injector seals and timing chain on 2.1 CDI.

1.8 Diesel: usual problem: injector seals and timing chain on 2.1 CDI.

"Usually lasts" is the mileage these engines commonly reach before major work; service history matters more than the number.

Parts for the Mercedes-Benz B Class

Enter the reg on the parts page to get the right fit.

Brake discsBrake padsClutch kitsBatteriesShock absorbersWheel bearingsWiper bladesBulbsGlow plugsEGR valves

Before you buy a used Mercedes-Benz B Class

Run a history check on the reg (write-off, finance owing, mileage), ask when the last service was done and for receipts, and start it from cold yourself. The used car checklist takes you through a viewing step by step.

Other Mercedes-Benz guides

Mercedes-Benz E ClassMercedes-Benz A ClassMercedes-Benz C ClassMercedes-Benz CLA ClassMercedes-Benz GLC ClassMercedes-Benz GLA ClassMercedes-Benz GLE ClassMercedes-Benz GLB