12/31/2014 hi, customer care / technical adviser, mb usa. I am unable to contact and discuss with any customer care or technical care adviser today. Mercedes benz, e-500, 2005, v8, 4 door sedan yesterday, 12/30/2014 between 9:30 to 10:30 am, we both (me and my wife, [xxx]) were in the car luckily we had taken an exit from the highway 404 north in york region, ontario, canada when…
2005 Mercedes-Benz E-Class brakes problems
severe 91 complaints filed with NHTSA · avg repair $450 · see brakes across all vehicles →
Failure mileage
Complaints
91
Recalls
0
Avg fix
$450
7crashes
5injuries
When does it fail?
Of the 91 brakes complaints filed for the 2005 Mercedes-Benz E-Class, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 10 model years of Mercedes-Benz E-Class we track for brakes problems, this one carries the most owner complaints on file — 91.
Owners have filed 91 brakes complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
The failure pattern owners describe
Buyer takeaway: The 2005 E-Class SBC brake system is prone to sudden, unpredictable failure with minimal warning and dangerous loss of braking power. Buy this car only if you can absorb a $2,000+ brake repair and verify the SBC was already replaced under the now-expired 10-year warranty; otherwise, plan for a costly surprise repair that Mercedes will likely fight.
The Sensotronic Brake Control (SBC) system on these 2005 E-Class models has a documented pattern of failure. Owners report the brake pedal going to the floor with little to no stopping power, often accompanied by a red warning light reading "reduced braking power" or "brake failure." The failure typically happens without advance warning while driving, forcing owners to use parking brakes, downshift to neutral, or coast to a safe stop.
When the SBC fails, the hydraulic backup system provides inadequate braking—some owners describe losing 90% of braking power with only front brakes operable. Many report the system resets and functions normally after the ignition is cycled off and back on, masking the severity until the next failure.
Mercedes extended the SBC warranty from 4 years/50,000 miles to 10 years/unlimited mileage. However, owners report dealers did not proactively notify them of this extended coverage. When the warranty expires, repair costs run $1,800–$3,000 for SBC unit replacement. Owners say dealerships sometimes blame drivers for the cost, claiming they drove the car during the failure and thus voided coverage. Some dealers refuse diagnostic documentation, making it difficult for owners to prove when the failure actually occurred. A few owners had repairs covered under the extended warranty, but replacements sometimes fail again within months. Dealers often cannot duplicate the failure for diagnostics, and codes sometimes clear themselves when the car is restarted.
The core complaint is that Mercedes knew about the defect—they discontinued the SBC in 2006 and extended the warranty precisely because of this known issue—yet never notified owners and refuses to acknowledge it as a safety recall.
Same Mercedes-Benz E-Class brakes reports on nearby years: 2006
Failure modes owners describe
SBC Pump/Hydraulic Unit Failure
The Sensotronic Brake Control pump or hydraulic unit fails, causing sudden loss of power-assisted braking. The system defaults to a manual hydraulic backup that operates only on front wheels and requires significantly greater pedal force. Owners report pedal going to the floor with minimal or no stopping power.
When: Typically between 68,000–130,000 miles; failures reported on vehicles 9–10 years old, around the end of the 10-year extended warranty period
Symptoms owners cite: Brake pedal travels to the floor with no resistance; Red warning light: 'Reduced Braking Power' or 'Brake Failure'; Beeping or audible alarm; Dramatic increase in stopping distance; Loss of 90% of braking power in emergency backup mode; Warning clears and brakes function normally after engine restart; Intermittent failures over time
Codes mentioned: C2131 - Pressure Reservoir Faulty, C249F - Operating Time of Component A7/3 (SBC Left Hydraulic Unit) Exceeded, C25D5 - Hydraulic Fault, Malfunction in Pressure Supply, C233D - Pressure System Failure, C22BC - Pressure Failure, C23BD - Pressure Failure, C223C - Pressure Failure, C26DE - Pressure Failure
Repairs/costs cited: SBC hydraulic unit or pump replacement; cost $1,800–$3,000. Some owners paid $1,060–$2,700 out-of-pocket after extended warranty expired. A few owners also had brake fluid flushed ($465–$600) before dealer would honor warranty. One owner reported needing replacement of brake pressure reservoir (multiple attempts, $1,767), then SBC pump ($2,000). Replacement units sometimes fail again within months.
Recalls/TSBs owners mention: Extended warranty: 10 years/unlimited mileage on SBC (original: 4 years/50,000 miles). Warranty covers only units that have already failed and throw a stored fault code. Mercedes discontinued SBC in 2006 model year. Extended warranty did not include proactive owner notification. Dealers sometimes deny coverage if they claim the car was driven after failure began. Some owners were offered a 'goodwill' discount (e.g., 10% off repair cost) after complaint escalation. NHTSA Recall Campaigns 04V296000, 05V133000, 2005070007, and 2005110001 exist but some owners report their VINs were not included or dealers claimed the recall had expired.
Brake Pressure Reservoir Failure
The brake pressure reservoir fails, requiring replacement. In some cases, replaced reservoirs prove faulty and require a second replacement, masking whether the pump itself has failed.
When: Mileage not specified in most reports; one case at 40,000 miles
Symptoms owners cite: Brake repair alert on dashboard; Reduced braking power warning
Codes mentioned: C2131 - Pressure Reservoir Faulty
Repairs/costs cited: Brake pressure reservoir replacement; one owner paid $1,767 for reservoir and fluid flush, then an additional $2,000 for SBC pump after a second faulty reservoir was discovered.
Recalls/TSBs owners mention: Extended warranty covers replacement under service campaign if codes are present.
Synthesized from 91 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
I was slowing down to exit the highway and when I stepped on the brakes, I felt no pressure on the pedal brakes. I pressed harder on the brakes and still the car didn't slow until I got to a slight incline at the end of the ramp. Then a red warning light on the dashboard appeared reading "reduced brake power". I turned off the engine and waited a couple of minutes. I managed to get home…
Tl* the contact owns a 2005 Mercedes benz e500. The contact stated that all the lights on the instrument panel illuminated and the message board displayed reduce braking power. The failure recurred on numerous occasions. The vehicle was taken to the dealer where it was diagnosed that the hydraulic brake pump needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the…
This is not about an accident. It's about the vehicle's condition. Precisely, about the brake service warning. Red warning with beeping on dashboard saying I need to bring it to workshop for service. My wife was driving this car when she felt something was wrong with the car and she brought it to her trustful mechanic for check up right away sameday That mechanic gave up to look any further…
Mercedes benz of fort washington has denied a replacement of sbc unit and components under a safety recall. I lost brakes while driving. 'decreased brakes power' red message appeared
Tl* the contact owns a 2005 Mercedes-benz e500. While driving at an unknown speed, the brakes lost power and did not stop the vehicle. In addition, the 'stop driving the vehicle' warning indicator illuminated. The contact used the emergency brake to stop the vehicle. The vehicle was taken to Mercedes-benz of encino (888-280-0902, located at 16721 ventura blvd, encino, ca 91436). The technician…
Tl* the contact owns a 2005 Mercedes benz e500. The contact was driving approximately 30 MPH and applied the brakes however, the brakes malfunctioned and caused the contact to momentarily lose control of the vehicle. The braking power reduced warning light illuminated after the failure occurred. The vehicle was taken to a local mechanic but the failure could not be duplicated and no repairs were…
Had brakes trouble with your 2005 Mercedes-Benz E-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the brakes problem on the 2005 Mercedes-Benz E-Class?
It's a meaningful issue. 91 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $450.
At what mileage does the brakes typically fail?
Across the 72 complaints that reported odometer mileage, most brakes failures cluster between 85,000 and 132,000 miles, with the median around 106,068. A quarter of owners report trouble before 85,000; a quarter make it past 132,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $450 for brakes repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to brakes?
No active recalls currently cover brakes issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Mercedes-Benz/E-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.