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Mercedes: reliability & common problems

#21 of 24
Longevity rank#1 Tesla holds up to ~176k
~106k
Trouble-free mileageacross all body styles
258
Mercedes vehicles inspectedreal pre-purchase inspections
63/100
Average conditionall cars we check: 60/100



Based on 258 used Mercedes vehicles we inspected, they tend to be in slightly better shape than average — average condition 63/100 vs 60 for all cars we check. Every number on this page comes from real pre-purchase inspections — cars people were about to buy and paid an independent inspector to go through point by point, engine to underbody, paint depth to error codes. Not owner surveys, not warranty statistics, not forum lore: what we actually found.

What we found

Most common faults

Oil leaks · Engine
66%
Active error codes · Electronic equipment
53%
Tires condition & wear · Brakes and tires
40%
Fuel trim out of range · Engine
36%
Electronic components issues · Engine
20%

Share of inspected Mercedes vehicles where each item was flagged.

How they score

Excellent 16% Good 45% Mediocre 31% Poor 8%
Hidden history

What the seller might not mention — how often we find it on Mercedes vehicles.

79%had a repainted or replaced panelall cars: 76%
2%showed structural repairall cars: 4%
20%had fault codes recently clearedall cars: 23%

Compare with another brand:

Cross-shopping? Mercedes vs BMW · Mercedes vs Lexus · Mercedes vs Audi

How long does a Mercedes last?

Across every Mercedes body style we've inspected — sedans, SUVs and anything else pooled together — the average one's condition dips below decent (a 55/100 score) around ~106k miles. It ranks Mercedes #21 of 24 brands we have enough data to rate; the longest-lasting, Tesla, holds up to ~176k. Shopping a Mercedes near that mileage? Expect more wear ahead — see which makes give the best odds at your budget.



Good cars by mileage
0 25 50 75 100 0–20k mi: 96% in good shape (28 cars) 20–40k mi: 89% in good shape (45 cars) 40–60k mi: 70% in good shape (44 cars) 60–80k mi: 49% in good shape (41 cars) 80–100k mi: 59% in good shape (34 cars) 100–120k mi: 23% in good shape (22 cars) 120–140k mi: 31% in good shape (16 cars) 140–160k mi: 38% in good shape (8 cars) 160–180k mi: 17% in good shape (6 cars) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
0 25 50 75 100 1 years old: 89% in good shape (9 cars) 2 years old: 100% in good shape (16 cars) 3 years old: 96% in good shape (23 cars) 4 years old: 92% in good shape (24 cars) 5 years old: 72% in good shape (25 cars) 6 years old: 59% in good shape (22 cars) 7 years old: 67% in good shape (21 cars) 8 years old: 63% in good shape (19 cars) 9 years old: 50% in good shape (16 cars) 10 years old: 36% in good shape (11 cars) 11 years old: 50% in good shape (8 cars) 12 years old: 43% in good shape (14 cars) 13 years old: 17% in good shape (12 cars) 14 years old: 11% in good shape (9 cars) 16 years old: 20% in good shape (5 cars) 2y 4y 6y 8y 10y 12y 14y 16y vehicle age when we inspected it

Share of Mercedes vehicles in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; rolled-back odometers excluded from the mileage curve). The dashed grey curve is all cars we check.

Is Mercedes getting better?
▬ Consistent across generations 40% 60% 80% 2012–14: 58% in good shape (age-adjusted; 32 cars, raw 59%) 58 2015–17: 64% in good shape (age-adjusted; 41 cars, raw 66%) 64 2018+: 53% in good shape (age-adjusted; 33 cars, raw 61%) 53 2009–11 2012–14 2015–17 2018+

Share of Mercedes vehicles in good shape (60+/100) when inspected at the same age — 5–10 years old, age-adjusted — by model-year generation; the dashed line is the all-brand average. Compare every brand's trajectory →



Mercedes models we've inspected
S-Class 28 cars · 75% good E-Class 31 cars · 68% good C-Class 31 cars · 48% good GLC 20 cars · profile soon Sprinter 17 cars · profile soon GLE 14 cars · profile soon ML 13 cars · profile soon SLK 12 cars · profile soon GLS 11 cars · profile soon GLK 10 cars · profile soon

Recently inspected:

2023 Mercedes Sprinter · 21k mi — flagged: battery condition, fault codes recently cleared, engine control module. Inspected Jul 2.
2016 Mercedes C300 · 90k mi — flagged: belts, oil leaks, fuel trim out of range. Inspected Jun 24.
The bottom line

The heavy concentration of oil leaks and engine electronics problems means any Mercedes you're considering needs a thorough under-hood inspection and code scan first thing. Aim for a 2015-17 example, the generation that holds good condition best after age adjustment, and be extra cautious with 2018+ cars that lag behind. These vehicles typically drop below decent shape by 106,000 miles and rank near last for longevity, so high-mileage ones are riskier bets—walk if you find active leaks or uncleared codes, and negotiate hard using any repaint work or worn tires as leverage.

FAQ
?
Is Mercedes reliable?
61% of the 258 Mercedes vehicles we inspected scored 60/100 or higher, averaging 63/100 — they tend to be in slightly better shape than average.
?
What are the most common problems with a used Mercedes?
Across the Mercedes vehicles we inspected, the items we flag most often are oil leaks (66%), active error codes (53%), tires condition & wear (40%).
?
Are newer Mercedes vehicles more reliable than older ones?
About the same — comparing generations at the same age (5–10 years old), Mercedes's share of cars in good shape has stayed consistent.
Thinking of buying a Mercedes? Get the exact car inspected before you pay.
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Based on 258 inspections · updated Jul 12, 2026