1995 Mercedes-Benz 129 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 1995 Mercedes-Benz 129, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical250.0%
- Engine125.0%
- Fuel system125.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
ASR LIGHT CAME ON, CAME UP TO A RED LIGHT ON A HILL, STOPPED , LIGHT TURNED GREEN AND WHEN I ATTEMPTED TO ACCELERATE THE CAR HAD ALMOST NO POWER AND HAD A VERY HARD TIME GETTING THROUGH THE LIGHT. THE CAR WAS TAKEN TO THE REPAIR SHOP WHERE THEY WERE UNABLE TO DIAGNOSE THE PROBLEM. THE TESTER WAS UNABLE TO COMMUNICATE WITH THE CONTROL MODULE. I FINALLY FOUND A REPAIR SHOP THAT KNEW ABOUT THIS CAR HAVING A KNOWN PROBLEM. WHEN HE SHOWED ME THE WIRING IT HAD CRACKED BROKEN MISSING INSULATION ON THE ALL THE WIRES. HE SAID THAT SINCE THE WIRING WAS MISSING IT'S INSULATION IT WAS SHORTING OUT. THE E T A WHICH CAUSED THE LIMP MODE. *TR
CHECK ENGINE LIGHT ON DASHBOARD,IDLE ROUGH,STALLING OF CAR. I CHECKED THE ENGINE HARNESS CONNECTOR TO THE AIR MASS METER AND GENTLY MOVED THE WIRES. THE OUTSIDE INSULATION BEGAN TO SMOKE, THEN MELTED FROM THE HEAT. I QUICKLY TURNED OFF THE CAR'S ENGINE AND CHECKED THE DAMAGE. THE INSULATION COVERING THE 4 WIRES INSIDE OF THE HARNESS HAD TOTALLY DISINTEGRATED, THUS CAUSING SHORT CIRCUITS IN THE HARNESS. THE HEAT GENERATED ACTUALLY MELTED THE OUTSIDE COVERING OF THE WIRES BOTH AT THE AIR MASS METER CONNECTOR AND UNDERNEATH THE MAIN ENGINE COMPUTER(ECU). I HAD THE CAR TOWED TO THE LOCAL MB DEALER AND THEY SAID THAT THE WHOLE BODY WIRING HARNESS WAS DESTROYED AND HAD TO BE REPLACED AT A COST OF $1250 PLUS $600 FOR THE HARNESS. MB SAID IT WAS NORMAL WEAR AND TEAR AND OFFERED NO ASSISTANCE. I FEEL THAT THE HARNESSES ON MY 1995 SL320 WERE MADE FROM SUBSTANDARD MATERIALS AND THUS DISINTEGRATED PREMATURELY PUTTING MYSELF AT RISK FROM A POSSIBLE CAR FIRE. I STILL HAVE THE HARNESS IF YOU WOULD LIKE TO INSPECT IT. ANOTHER HARNESS, THE ENGINE WIRING HARNESS WAS ALSO FOUND TO BE DEFECTIVE, CAUSING SHORT CIRCUITS, AND WAS REPLACED BY MB UNDER WARRANTY IN 1998. SO FAR I HAVE REPLACED 4 DIFFERENT WIRING HARNESS ON MY CAR, ALL SHOWING THE SAME DECOMPOSITION OF THE WIRING INSULATION. *NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
ASR LIGHT CAME ON, CAME UP TO A RED LIGHT ON A HILL, STOPPED , LIGHT TURNED GREEN AND WHEN I ATTEMPTED TO ACCELERATE THE CAR HAD ALMOST NO POWER AND HAD A VERY HARD TIME GETTING THROUGH THE LIGHT. THE CAR WAS TAKEN TO THE REPAIR SHOP WHERE THEY WERE UNABLE TO DIAGNOSE THE PROBLEM. THE TESTER WAS UNABLE TO COMMUNICATE WITH THE CONTROL MODULE. I FINALLY FOUND A REPAIR SHOP THAT KNEW ABOUT THIS CAR HAVING A KNOWN PROBLEM. WHEN HE SHOWED ME THE WIRING IT HAD CRACKED BROKEN MISSING INSULATION ON THE ALL THE WIRES. HE SAID THAT SINCE THE WIRING WAS MISSING IT'S INSULATION IT WAS SHORTING OUT. THE E T A WHICH CAUSED THE LIMP MODE. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
ASR LIGHT CAME ON, CAME UP TO A RED LIGHT ON A HILL, STOPPED , LIGHT TURNED GREEN AND WHEN I ATTEMPTED TO ACCELERATE THE CAR HAD ALMOST NO POWER AND HAD A VERY HARD TIME GETTING THROUGH THE LIGHT. THE CAR WAS TAKEN TO THE REPAIR SHOP WHERE THEY WERE UNABLE TO DIAGNOSE THE PROBLEM. THE TESTER WAS UNABLE TO COMMUNICATE WITH THE CONTROL MODULE. I FINALLY FOUND A REPAIR SHOP THAT KNEW ABOUT THIS CAR HAVING A KNOWN PROBLEM. WHEN HE SHOWED ME THE WIRING IT HAD CRACKED BROKEN MISSING INSULATION ON THE ALL THE WIRES. HE SAID THAT SINCE THE WIRING WAS MISSING IT'S INSULATION IT WAS SHORTING OUT. THE E T A WHICH CAUSED THE LIMP MODE. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .