Mercedes Benz 300SD problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
10 owner complaints analyzed
0 distinct recall campaigns
192,280 mi median reported failure mileage
Scope: 1984 to 1993 model years. Data snapshot: . 6 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Electrical System is the most frequently named component, appearing in 3 of 10 complaints (30.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Electrical and battery issues | 4 | 40.0% |
| Braking behavior | 1 | 10.0% |
| Steering behavior | 1 | 10.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Electrical System | 3 |
| Electrical System:Wiring | 1 |
| Electrical System:Wiring:Front Underhood | 1 |
| Engine And Engine Cooling:Engine:Gasoline | 1 |
| Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip | 1 |
| Steering:Linkages | 1 |
| Tires | 1 |
| Tires:Tread/Belt | 1 |
Electrical System: 3; Electrical System:Wiring: 1; Electrical System:Wiring:Front Underhood: 1; Engine And Engine Cooling:Engine:Gasoline: 1; Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip: 1; Steering:Linkages: 1; Tires: 1; Tires:Tread/Belt: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 1 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 1 |
| 150,000 and above | 4 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 1; 75,000 to 99,999: 0; 100,000 to 149,999: 1; 150,000 and above: 4
150,000 and above miles has the most reports with usable mileage (4). 4 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2000 | 3 |
| 2001 | 1 |
| 2005 | 1 |
| 2009 | 1 |
| 2010 | 1 |
| 2014 | 1 |
| 2016 | 1 |
| 2019 | 1 |
2000: 3; 2001: 1; 2005: 1; 2009: 1; 2010: 1; 2014: 1; 2016: 1; 2019: 1
Pattern summary
Electrical System leads the component reports. Electrical and battery issues appears in 4 complaint narratives. Braking behavior appears in 1 complaint narratives. Steering behavior appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10598965 · 2014-06-17 (June 17, 2014)
ENGINE WIRING HARNESS PART# [phone removed]. THIS HARNESS HAS COMPLETELY DETERIORATED CAUSING THE ENGINE TO BE INOPERABLE. AFTER MONTHS OF RESEARCH ONLINE AND PHONE CALLS TO MB I HAVE NO PARTS AND NO ANSWERS TO THE PROBLEM. SO MANY OF THESE CARS HAVE HAD THESE PROBLEMS AND YET NO RECALL HAS BEEN ISSUED. WHY? IT IS A FIRE WAITING TO HAPPEN. THERE ARE MANY HARNESS AVAILABLE FOR VARIOUS MODELS WITH THE INFAMOUS "BIODEGRADABLE" WIRING PROBLEM. THERE ARE MANY DIFFERENT PRICE RANGES ALSO, BUT THEY ARE AVAILABLE. AS FOR THE ONE THAT I NEED IT IS…
Owner-reported narrative. 195,560 miles reported. Look up ODI 10598965 at NHTSA ↗
Owner report 10141195 · 2005-10-29 (October 29, 2005)
ENGINE WIRING HARNESS FAILURE. APPARENTLY THERE HAVE BEEN OVER 100 OF THESE REPORTED BUT NO ACTION. WHY? *JB
Owner-reported narrative. 254,260 miles reported. Look up ODI 10141195 at NHTSA ↗
Owner report 879646 · 2001-02-02 (February 2, 2001)
WHILE DRIVING ON THE HIGHWAY, THE ACCELERATOR PEDAL STUCK AND THE BRAKES FAILED TO STOP VEHICLE, CAUSING LOSS OF CONTROL OF THE VEHICLE. *AK *YD
Owner-reported narrative. Look up ODI 879646 at NHTSA ↗
Owner report 725746 · 2000-07-20 (July 20, 2000)
UNCONTROLABLE STEERING SHAKE AT 50 MPH
Owner-reported narrative. Look up ODI 725746 at NHTSA ↗
Recalls by model year
All campaigns in the snapshot affecting each model year, including recalls announced years later.
Recall campaigns
Shared campaigns appear once in each affected model year.
| Category | Count |
|---|---|
| 1984 | 0 |
| 1992 | 0 |
| 1993 | 0 |
1984: 0; 1992: 0; 1993: 0