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Mercedes: Reliability & Common Problems

#23 of 24
Longevity rank#1 Tesla holds up to ~184k
~92k
Trouble-free mileageacross all body styles
278
Mercedes vehicles inspectedreal pre-purchase inspections
62/100
Average conditionall cars we check: 61/100



Based on 278 used Mercedes vehicles we inspected, they are in about average shape — average condition 62/100 vs 61 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
64%
Active error codes · Electronic equipment
49%
Tires condition & wear · Brakes and tires
39%
Fuel trim out of range · Engine
36%
Electronic components issues · Engine
19%

Share of inspected Mercedes vehicles where each item was flagged.

How they score

Excellent 27% Good 29% Mediocre 24% Poor 20%
Hidden history

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

77%had a repainted or replaced panelall cars: 74%
1%showed structural repairall cars: 4%
20%had fault codes recently clearedall cars: 24%

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 ~92k miles. It ranks Mercedes #23 of 24 brands we have enough data to rate; the longest-lasting, Tesla, holds up to ~184k. 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: 90% in good shape (29 cars) 20–40k mi: 78% in good shape (50 cars) 40–60k mi: 71% in good shape (49 cars) 60–80k mi: 53% in good shape (45 cars) 80–100k mi: 46% in good shape (37 cars) 100–120k mi: 13% in good shape (23 cars) 120–140k mi: 11%, drawn from the nearby bands (17 cars in this band) 140–160k mi: 9%, drawn from the nearby bands (8 cars in this band) 160–180k mi: 8%, drawn from the nearby bands (6 cars in this band) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
0 25 50 75 100 1 years old: 94%, drawn from the nearby bands (12 cars this age) 2 years old: 92%, drawn from the nearby bands (17 cars this age) 3 years old: 88% in good shape (25 cars) 4 years old: 80% in good shape (25 cars) 5 years old: 68% in good shape (28 cars) 6 years old: 61% in good shape (23 cars) 7 years old: 59% in good shape (22 cars) 8 years old: 51%, drawn from the nearby bands (19 cars this age) 9 years old: 39%, drawn from the nearby bands (19 cars this age) 10 years old: 39%, drawn from the nearby bands (11 cars this age) 11 years old: 31%, drawn from the nearby bands (11 cars this age) 12 years old: 24%, drawn from the nearby bands (14 cars this age) 13 years old: 18%, drawn from the nearby bands (12 cars this age) 14 years old: 19%, drawn from the nearby bands (10 cars this age) 16 years old: 29%, drawn from the nearby bands (5 cars this age) 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; a band under 20 cars follows the nearby bands, so a run above the all-cars line stays above it, and a band of 20 or more uses the rate we measured; where a band has too few cars, the line follows the trend between the bands on either side; rolled-back odometers excluded from the mileage curve). The dashed grey curve is all cars we check.

Is Mercedes getting better?
▲ Newer Mercedes vehicles are holding up better 40% 60% 80% 2012–14: 43% in good shape (age-adjusted; 32 cars, raw 44%) 43 2015–17: 56% in good shape (age-adjusted; 44 cars, raw 57%) 56 2018–20: 61% in good shape (age-adjusted; 34 cars, raw 68%) 61 2009–11 2012–14 2015–17 2018–20 2021+

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 · 68% good E-Class 32 cars · 56% good C-Class 35 cars · 40% good GLC 22 cars · profile soon Sprinter 18 cars · profile soon GLE 18 cars · profile soon ML 13 cars · profile soon GLS 13 cars · profile soon SLK 12 cars · profile soon GLK 11 cars · profile soon SL 10 cars · profile soon CLA 10 cars · profile soon

Recently inspected:

2017 Mercedes CLA 250 · 65k mi — flagged: fault codes recently cleared, fuel trim out of range, engine control module. Inspected Nov 10.
2021 Mercedes Benz Sprinter · 79k mi — flagged: low coolant / cooling system issues, charging voltage, signal acquisition and actuation module. Inspected Nov 6.
The bottom line

Oil leaks and fuel-trim faults dominate what we find, with active error codes close behind, so the first move on any Mercedes is the engine bay and a scan, not the structure. These cars slip below decent condition around 92,000 miles and rank near the bottom for how long they stay decent, which means a higher-mileage example with leaks plus codes is grounds to negotiate hard or walk. Structural repairs are uncommon, so a repainted panel by itself is not the red flag. Age-adjusted, 2018–20 cars are the ones most often still in good shape; 2012–14 is where you should be pickiest.

FAQ
?
Is Mercedes reliable?
56% of the 278 Mercedes vehicles we inspected scored 60/100 or higher, averaging 62/100 — they are in about average shape.
?
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 (64%), active error codes (49%), tires condition & wear (39%).
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Are newer Mercedes vehicles more reliable than older ones?
Yes — comparing generations at the same age (5–10 years old), newer Mercedes vehicles hold up clearly better than the early-2010s ones.
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Based on 278 inspections · updated Nov 12, 2026