Mercedes-Benz 420SEL Car Starter Repair at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(19)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(19)

Car Starter Repair Service

How much does a Car Starter Repair cost?

On average, the cost for a Mercedes-Benz 420SEL Car Starter Repair is $451 with $241 for parts and $210 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1991 Mercedes-Benz 420SELV8-4.2LService typeCar Starter RepairEstimate$1482.50Shop/Dealer Price$1804.45 - $2749.04
1990 Mercedes-Benz 420SELV8-4.2LService typeCar Starter RepairEstimate$1468.99Shop/Dealer Price$1786.30 - $2727.41
Show example Mercedes-Benz 420SEL Car Starter Repair prices

What's a car starter motor and how does it work?

The starter motor is a powerful, compact electric motor that will turn a car’s engine over at about 200 RPM in order to start the engine. The starter is at the terminus of a circuit that includes the battery, the ignition switch, a neutral safety switch, relays and fuses.

When you turn the ignition key to start, or press the start button in some vehicles, the starter circuit is completed and the starter will run. Most starters have a small pinion gear that engages a larger ring gear on the flywheel when the starter is powered on. The pinion gear turns the engine flywheel at about 200 RPM. Since the flywheel is directly connected to the crankshaft, all engine components will then turn in sync and the engine starts.

Starter

When to replace the starter?

Starters are relatively durable but most will eventually fail in one or more of the following ways:

  • Intermittent operation of the starter. Starters can develop bad spots on the armature which will cause intermittent operation. This causes the starter to work sometimes and other times when you turn the key nothing happens.
  • Starter turns too slowly. Internal electrical and mechanical faults can cause the starter to draw too much current and in some cases the current drawn will exceed what the battery can supply. A consequence is the engine may not start as rapidly.
  • Unusual noises on starting. If you hear any type of grinding or other unusual noise while starting the engine, that should be investigated as the noise could reflect an internal starter failure or the noise could be due to pinion gear failure or flywheel ring gear damage.
  • Starter doesn’t function when turning the key. In some cases, the first symptom of a starter malfunction is a complete failure of the starter motor. This happens when you turn the ignition key to start the car, the starter motor does not function at all.

How do mechanics repair the starter?

  • If the starter is determined to be faulty, the battery must be disconnected prior to commencing any work. Once the battery is disconnected, the wiring to the starter is disconnected.
  • Starters are bolted to the engine block or the transmission case. Generally, there are two bolts. The procedure to access the starter varies across car models and can require removal, or lowering, of other vehicle components.
  • Once the starter is removed and a new starter is installed, the mounting bolts are tightened to the OEM factory torque specifications, the electrical connections are cleaned and re-attached to the starter and the starter is tested to confirm normal operation.

Is it safe to drive with a starter problem?

Once a vehicle engine is running, the starter is not in use. However, if you know that the starter is malfunctioning or working intermittently, you may be left stranded if you turn the engine off and the starter doesn’t function when restarting the engine. Should you know or suspect a problem with the starter, it is best to have the problem repaired to avoid being left stranded.

When replacing a faulty starter keep in mind:

  • Prior to replacing the starter, simple diagnostic tests should be performed to ensure that the problem is a faulty starter versus a weak battery, faulty neutral start switch, or other faulty electrical component in the starter motor circuit.
  • Starters draw large amounts of current from the battery, much more than any other electrically powered device in your car. This makes it important that the electrical connections to the battery are inspected, cleaned, and tightened as necessary. Cables to the starter should also be inspected for corrosion and replaced as needed.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(19)

Rating Summary
18
0
0
1
0
18
0
0
1
0

Carlos

29 years of experience
601 reviews
Carlos
29 years of experience
Mercedes-Benz 420SEL V8-4.2L - Serpentine/Drive Belt - Ontario, California
Carlos came on time (unlike others who cancelled the appointment several times). He came, TWICE because of my car needed more parts than expected. Great job, friendly, very professional, I HIGHLY recommend him, and will make sure next time - if needed - he will be the one I ask for. Thank you Carlos

Tien

24 years of experience
903 reviews
Tien
24 years of experience
Mercedes-Benz 420SEL V8-4.2L - Power Window Switch Replacement (Passenger Side Front, Passenger Side Rear) - Oakland, California
Tiens was very nice to work with. He fixed 2 things and ordered parts for other items.

Sayeed

18 years of experience
82 reviews
Sayeed
18 years of experience
Mercedes-Benz 420SEL V8-4.2L - Power Steering Fluid Service - Copiague, New York
Excellent

Patrick

34 years of experience
1579 reviews
Patrick
34 years of experience
Mercedes-Benz 420SEL V8-4.2L - Car is not starting - Pflugerville, Texas
Very good.

Excellent Rating

(19)

Rating Summary
18
0
0
1
0
18
0
0
1
0
Number of Mercedes-Benz 420SEL services completed
209+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 BMW 3-Series
The The 2012 BMW 3-Series has been wildly popular in the US since it was first introduced in 1975. This series of luxury sedans sets itself apart from other luxury models with its superior performance and driving dynamics. No matter...
How to Choose a Body Kit
If you want to make your car stand out (https://www.yourmechanic.com/article/how-to-customize-a-car) from the crowd, there are many options you can choose from to do so. For example, you can: Increase your engine performance Install aftermarket rims and tires Install a louder...
How to Apply Reflective Tape to Your Car
Applying Applying reflective tape to your car or truck is an inexpensive way to customize (https://www.yourmechanic.com/article/how-to-customize-a-car) it, allowing it to stand out from the crowd. The process is also simple enough that most people can do it themselves, saving the...

AC still run when I turn the truck off and it blows sometimes and sometimes not

Hi there. It sounds like you have a bad blower resistor. You should replace this first and then see if the blower motor is still blowing intermittently. If it is, this would mean the blower motor is bad and there...

when cranked up it revs up and down

Hello. This is a common issue in the 7.3 Liter Ford Diesels. There is something called an ICP (Injection Control Pressure) sensor (https://www.yourmechanic.com/services/injector-control-pressure-sensor-replacement) which is located at the front of the motor on the driver's side near the fuel filter....

There is an awful clunking rattling noise when the engine is running.

Hi there. There could be either the engine is having a bearing slap on the rod bearings with too much wear causing the noise or an accessory on the engine is locking up making the belt tensioner pop back and...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com