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Mercedes-Benz SL500 Problems

Find the most common issues based on Mercedes-Benz SL500 owner complaints.
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Most Common Mercedes-Benz SL500 Problems

The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too lo...
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
As vehicles age, various problems may develop with the hard and soft tops. If problems are encountered, it would be recommended to have a technician familiar with these tops perform the diagnoses.
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3 Known Mercedes-Benz SL500 Brakes Problems

As brake fluid becomes dirty over time, it can cause a failure of the anti-lock brake system (ABS) modulator assembly. Our technicians recommend a complete brake system flush every two years to hel...
The brakes may begin to squeak at about the 50 percent wear point. This is due to the size and material used for the brake pads and rotors. The brake rotor surfaces become uneven, causing a lip t...
This vehicle has sensotronic brake control (SBC). If the SBC light on the dash illuminates, have the brakes checked. If the SBC is not working, limited brake pressure is delivered to the front brak...

4 Known Mercedes-Benz SL500 Drive Train Problems

Leaks may develop from the differential cover and/or seals on high mileage or older vehicles. Our technicians recommend a complete reseal of the differential unit if these leaks are addressed.
A vibration felt through the center floor of the vehicle can be caused by cracked and/or shredded driveshaft flex discs, resulting in excessive driveshaft movement. If not repaired, damage to the...
High mileage vehicles may develop a leak from one or more of the transmission oil seals.

4 Known Mercedes-Benz SL500 Electrical & Lights Problems

The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.
The early versions of the central gateway module (which allows different systems to communicate with each other) have software problems.
The electronic throttle assembly may suffer an electrical failure. It is often cheaper to send the valve to a service center for repair that to purchase a new part.

10 Known Mercedes-Benz SL500 Engine Problems

The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engi...
An engine Oil leak may develop from the PCV vent housing on the valve cover and/or the inspection plate on the front of the engine.

2 Known Mercedes-Benz SL500 Exhaust & Emissions Problems

The emissions air injection pump can seize, causing a loud squealing noise followed by smoke from the drive belt. If the engine is not turned off, the belt will break, turning on the alternator/bat...
Throttle body actuators are known to fail.

4 Known Mercedes-Benz SL500 Heating & Air Conditioning Problems

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the a...
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
The climate control system can fail or perform erratically due to internal problems with the climate control button electrical contacts. Replacement of the climate control assembly is commonly re...

0 Known Mercedes-Benz SL500 Maintenance Problems

6 Known Mercedes-Benz SL500 Miscellaneous Problems

As vehicles age, various problems may develop with the hard and soft tops. If problems are encountered, it would be recommended to have a technician familiar with these tops perform the diagnoses.
Leaks in the pneumatic system will cause problems with the dynamic seats and the trunk and/or door closing assist.
Due to exposure to the sun, lenses for head lights may become opaque (cloudy or hazy). This reduces the effectiveness of the lights. Our technicians tell us plastic polishes can improve the clari...

7 Known Mercedes-Benz SL500 Suspension & Steering Problems

The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too lo...
The lower control arm bushings can wear and crack, resulting excessive movement at the control arm pivot point, leading to irregular and premature tire wear. Worn Ball joints can also cause similar...
One or more of the following steering linkage components may wear prematurely; tie rod ends, drag link, or idler arm. Our technicians remind us the wheel alignment should be checked and adjusted...

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Known Mercedes-Benz SL500 Problems & Complaints

The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too lo...
Due to exposure to the sun, lenses for head lights may become opaque (cloudy or hazy). This reduces the effectiveness of the lights. Our technicians tell us plastic polishes can improve the clari...
The climate control system can fail or perform erratically due to internal problems with the climate control button electrical contacts. Replacement of the climate control assembly is commonly re...
The early versions of the central gateway module (which allows different systems to communicate with each other) have software problems.
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
Bad spark plug wires can cause misfires; the Check Engine Light may illuminate.
Front thrust arm and control arm bushings can crack and sometimes tear completely. If this is not repaired quickly, damage to the front subframe unit will occur, which is very expensive to repair...
A knocking noise from the front end can be caused by cracked strut tower bushings.
Oil feed tubes break and fall into the crankcase (engine) and the tappet becomes noisy (ticking), resulting in degraded idle quality. Our technicians recommend replacing all of the tubes at the s...
The emissions air injection pump can seize, causing a loud squealing noise followed by smoke from the drive belt. If the engine is not turned off, the belt will break, turning on the alternator/bat...
The head lamp wipers are easily damaged, especially by automatic car washes.
A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engi...
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
Vehicles with automatic level control that ride harshly in the rear (no give in the suspension) may have one or both dampening actuators which have failed. It is commonly recommended the actuat...
Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can...
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