2015 Infiniti Q50 vs 2015 Mercedes-Benz C-Class
Two luxury sedans, compared on what actually matters when you're buying used:
what breaks, when it breaks, and what it costs you.
2015 Infiniti
Q50
6/10
The Q50 is what happens when brilliant chassis engineers and a cost-cut transmission team never talked to each other.
VS
2015 Mercedes-Benz
C-Class
5/10
Gorgeous, quiet, and surprisingly fun for a 'baby S-Class' — but check the rear subframe before you check anything else, because that's the one that can kill you, not just your wallet.
Milo scores the 2015 Infiniti Q50 higher — 6/10 against 5/10.
By the numbers
Green is the better number — higher on every score, lower on failures, complaints and recalls.
| Infiniti Q50 |
Mercedes-Benz C-Class |
| Known failure points | 5 | 6 |
| NHTSA complaints | 125 | 439 |
| Safety recalls | 3 | 0 |
| Service bulletins | 12 | 12 |
| Reliability | 52 | 58 |
| Cheap to own | 48 | 42 |
| Fun factor | 82 | 72 |
| Holds value | 40 | 38 |
| Enthusiast cred | 58 | 48 |
The most expensive thing that goes wrong
2015 Infiniti Q50
7-speed automatic valve body / TCM failure causing limp mode, harsh shifts, P0720/P0500 codes
$1,800–$3,50030k–70k mi
2015 Mercedes-Benz C-Class
Rear subframe corrosion (especially rust-belt/salt-road cars) — this is the big one, structurally significant
$1,500–$5,50050k–100k mi
If you buy one, buy this one
✅ 2015 Infiniti Q50
A 2015 Q50S with the 3.7L VQ37VHR (pre-VR30 twin-turbo years) and RWD — skip AWD to avoid driveshaft issues, and the naturally aspirated 3.7 sidesteps the earliest turbo teething problems while still being the sportiest non-turbo trim.
✅ 2015 Mercedes-Benz C-Class
A 2015 C400 4MATIC with steel Sport suspension (no AIRMATIC/air suspension), Premium and Multimedia packages, and — critically — full documentation the rear subframe has been inspected or already treated for corrosion.
Narrowed it down? Get the full report
This comparison is model-level.
Milo's report goes car-level — the one you're actually looking at:
- A line-by-line negotiation script
- The pre-purchase inspection checklist
- VIN-specific open recalls
- What it's really worth right now
- Your next 15,000 miles, forecast
- Hidden features & money-savers
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Scores and findings blend documented NHTSA recalls and complaints with
patterns synthesized from owner communities. Always inspect the specific vehicle and
verify open recalls by VIN before buying.