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Mercedes-Benz SL500 Won't Start

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Mercedes-Benz SL500 won't start?

While there are a variety of reasons your Mercedes-Benz SL500 won't start, the most common are a dead battery, an alternator problem, or failed starter.
38%
of the time it's
Battery
27%
of the time it's
Alternator
20%
of the time it's
Starter

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What to expect at the repair shop when your Mercedes-Benz SL500 won't start

What will be the outcome of a no start diagnosis?

Correcting most no-start problems usually involves replacing the alternator, starter, or battery, cleaning connections, ignition system repairs, or fuel system repairs. Due to the wide variety of components that can possibly cause a no-start condition, repairing this issue could involve replacing a fuse, or replacing the engine, and repair procedures are on a case-by-case basis.

RepairPal Recommendations for a no start diagnosis

When a vehicle doesn't start it can be for many reasons. To avoid replacing unneeded parts we recommend having a professional perform a diagnostic test to identify the root cause of the problem.

What to look out for with a no start diagnosis

Diagnosing modern automotive systems without proper knowledge and training can be frustratingly difficult, but without proper technique the diagnosis will only be reached through changing parts on a hunch. .Automotive systems, especially in the last 10 years, have become extremely advanced, and most vehicles have a communication network that allows all of the systems to communicate. This is a blessing for the trained technician, and a curse for the DIYer who would rather save money on the repair.

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See what others are asking about their Mercedes-Benz SL500. Get answers from RepairPal's community of auto experts and enthusiasts.
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Related Mercedes-Benz SL500 Problems

Find the most common driver-reported problems that are to blame when a Mercedes-Benz SL500 won't start.
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Mercedes-Benz SL500 Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Mercedes-Benz SL500 Won't Start Repair Symptoms

The battery is considered “dead” when there is insufficient charge to start the engine, or run electrical components. Normally, the first sign is dim lighting in the interior of...Read More
Fuel pumps require replacement if they leak or begin making too much noise, which is a sign of malfunction. A failing fuel pump will not create enough pressure in the fuel syste...Read More
When the electrical portion of the ignition switch fails, the vehicle will permanently or intermittently lose power to certain systems and components, depending on which positio...Read More
When the ignition switch lock cylinder fails, the ignition switch may very well work, but it may be difficult to find out, as the lock cylinder can fail to release when the key ...Read More
Starter motor failure produces one common symptom for all makes and models. When the key is turned, the starter solenoid will click, but the engine will not rotate. This may be ...Read More
When the computer senses the engine is out of time, the check engine light will be displayed, and the engine may start and stall, or fail to start. Some models may prevent the i...Read More
When the computer senses the engine is out of time, the check engine light will be displayed, and the engine may start and stall, or fail to start. Some models may prevent the i...Read More
As discussed, many things can trigger a no-start condition, so there may be associated symptoms. If there is an electrical problem followed by a no-start condition, there may be...Read More