1990-2002 Mercedes-Benz SL-Class: Reliability
Updated: 11/23/08
2002 Mercedes-Benz SL-Class
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1990-2002 Mercedes-Benz SL-Class ▼
- Price Range: $4,300 - $24,000
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Our reliability study for this generation Mercedes-Benz SL-Class includes details on average repair costs, manufacturer recalls, and everything you need to know to gauge the long-term reliability of this generation Mercedes-Benz SL-Class .
Trouble Spots
Consumer Guide's® Auto Editors have scoured repair bulletins and questioned mechanics to search
for commonly occurring problems for a particular vehicle. In some cases we also give possible manufacturer-suggested
solutions. In many instances these trouble spots are Technical Service Bulletins posted by the manufacturer,
however, we have our own expert looking at additional vehicle problems.
Automatic transmission:
The automatic transmission jerks when placed in drive or reverse or makes a grunting noise as the fluid deteriorates requiring a drain and refill (of at least 70 percent of the fluid) with revised ATF. (1997-99)
Brakes:
The ABS (antilock brake system) light may come on intermittently and the charging-system light may also come on, but very dim, if the alternator is not charging sufficiently and electrical loads are high. (1990-2002)
Clutch:
The clutch pedal may stick on 30SL models due to heat boiling the fluid. A countermeasure, insulated, slave cylinder is required. (1990)
Engine stalling:
The engine may stall when the transmission is shifted into gear due to water entering, and corroding, the neutral safety switch. (1992)
None:
Prior to 1994, engine compartments on the 600SL were not treated with antirust coatings. If desired, a wax type coating only should be applied after thorough cleaning. (1990-94)
None:
The hot film mass-airflow sensors have a history of failure often caused by ill-fitting air filters or housing covers and by damaged protective screens located in front of the airflow sensor. (1990-1999)
Timing belt:
Timing-chain tensioner weakness causes knocking and rattling from the front of the engine, especially when hot. (1997-98)
Valve cover leaks:
Oil weeps at head gaskets, leaks at valve cover gaskets (1990-95), rear end caps (1990-97), oil-pan gaskets (1990-92).
Valve cover leaks:
During aggressive driving, especially in turns, oil can get into the air filter-housing requiring a vented valve cover. (1990)
Water leak:
The central locking system fails from leaks in the system allowing moisture to form in the lines which freezes in cold weather. (1990-02)
Water leak:
Rain water drips on the starter causing failure requiring a redesigned water drain. (1998-99) Also, water leaks into the molding at the top of the windshield (1999), between A-pillar and soft top (1997), at the A-pillar on hardtops (1994), at the roof near the front doors on hardtops (1994), and from the outside mirrors (1990-95).
Wheels:
In tight turns, the drive wheels may chirp due to the limited-slip differential. The problem can be reduced by removing one of the clutch plates. (1990-97)
Consumer Guide® Estimated Repair Costs
This table lists costs of likely repairs for comparison with other vehicles. The
dollar amount includes the cost of the part(s) and labor (based on $50 per hour) for the
typical repair without extras or add-ons. Like the pricing information, replacement
costs can vary widely depending on region. Expect charges at a new-car dealership
to be slightly higher.
| Item Name | Repair Cost |
| A/C Compressor | $655 |
| Alternator | $440 |
| Automatic Transmission or Transaxle | $1,525 |
| Brakes | $810 |
| Clutch, Pressure Plate, Bearing | $0 |
| Constant Velocity Joints | $1,405 |
| Exhaust System | $785 |
| Radiator | $610 |
| Shocks and/or Struts | $2,340 |
| Timing Chain or Belt | $400 |
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