Known APK problem
Mercedes-Benz A-Klasse W177: control arms / ball joints
On the Mercedes-Benz A-Klasse W177 the APK inspector finds control arms / ball joints problems 2.8× as often as on cars of the same age: at 7–8 years 2.5%, against about 0.9% nationally.
Window: Oct 2025 – Sep 2026 · Updated: 16 Oct 2026
What is it?
Worn bushes or ball joints in the suspension.
How to check it at the viewing
Listen for clunks or knocks over speed bumps on the test drive. The car should not wander when braking.
Ask the seller: Have the control arms or ball joints been replaced?
By age
Share of inspected Mercedes-Benz A-Klasse W177s with this defect, compared with all cars of the same age.
| Age | Type | A-Klasse W177 | National | Difference |
|---|---|---|---|---|
| 5 – 6 years | A | 0.2% | 0.3% | 0.8× |
| 5 – 6 years | C | 1.1% | 0.8% | 1.3× |
| 7 – 8 years | A | 0.4% | 0.6% | 0.7× |
| 7 – 8 years | C | 2.5% | 0.9% | 2.8× |
A = structure, safety or costly mechanics; B = fail, usually simple; C = advisory. An age is missing when this defect is not among the most common there.
Comparable cars at 7–8 years
| Model | Control arms / ball joints | Vs. national |
|---|---|---|
| Mercedes-Benz A-Klasse W177 | 2.5% | 2.8× |
| BMW 1-serie F20 | 0.3% | 0.3× |
| Toyota Auris II | 0.2% | 0.5× |
| Peugeot 308 II | 0.4% | 0.5× |
| Opel Astra K | 0.2% | 0.3× |
Looking at a Mercedes-Benz A-Klasse W177? Check that car
Enter the plate and see the APK history, open recalls and how this car compares with other Mercedes-Benz A-Klasse W177s of the same age.
All weak spots of the Mercedes-Benz A-Klasse W177 · Control arms / ball joints: which models more often · Checklist for this model
Frequently asked questions
Does the Mercedes-Benz A-Klasse W177 often have control arms / ball joints problems?
Yes, more often than average at the APK. At 7–8 years the inspector found a control arms / ball joints defect on 2.5% of inspected Mercedes-Benz A-Klasse W177s, against about 0.9% of all cars of the same age (2.8×). Source: RDW Open Data, Oct 2025 – Sep 2026.
How do you check the control arms / ball joints on a used Mercedes-Benz A-Klasse W177?
Listen for clunks or knocks over speed bumps on the test drive. The car should not wander when braking.
Repair indication: small, medium or large. An indication of the usual repair, not a quote: the real cost depends on the car, the cause and the garage.
Source: RDW Open Data (CC0), analysis CarXray.nl. 6,857,004 inspected passenger cars aged 3 years and older, Oct 2025 – Sep 2026. Each car counts once. How we know