Mercedes-Benz 300SD Throttle Body Replacement Costs

Car	Service	Estimate	Shop/Dealer Price
1992 Mercedes-Benz 300SDL6-3.4L Turbo Diesel	Service typeThrottle Body Replacement	Estimate$2361.84	Shop/Dealer Price$2910.12 - $4536.51
1993 Mercedes-Benz 300SDL6-3.4L Turbo Diesel	Service typeThrottle Body Replacement	Estimate$2350.13	Shop/Dealer Price$2894.38 - $4517.77

Car

Service

Estimate

Shop/Dealer Price

1992 Mercedes-Benz 300SDL6-3.4L Turbo Diesel

Service typeThrottle Body Replacement

Estimate$2361.84

Shop/Dealer Price$2910.12 - $4536.51

1993 Mercedes-Benz 300SDL6-3.4L Turbo Diesel

Service typeThrottle Body Replacement

Estimate$2350.13

Shop/Dealer Price$2894.38 - $4517.77

What is the throttle body and how does it work?

The throttle body is an air metering device mounted between the air filter and snorkel, and the intake plenum. Within the throttle body is a movable throttle plate whose position controls the amount of air that enters the engine to determine engine speed. Throttle body designs vary. Some incorporate an idle air control valve, throttle position sensor, and other electronic throttle controls. The throttle plate in the throttle body can be controlled directly by an accelerator pedal cable or fully electronically in the newest drive-by-wire systems.

When to consider replacing the throttle body:

Check engine light and/or reduced power warning light is on. Most modern throttle bodies have electrical components, such as a throttle position sensor. These components are monitored by the powertrain control module (PCM). If the check engine light or reduced power warning light comes on, a mechanic will determine if any of the stored trouble codes implicate a throttle body malfunction.
Wrong idle speed. Carbon deposits in the throttle body, particularly around the movable throttle plate or in the idle air control valve, can cause the engine idle speed to be too low or too high.
Poor transmission shifting. In some applications, transmission shift timing relies on signal outputs from the throttle body. If the throttle position sensor is defective, that might adversely affect shift timing and feel.

How do mechanics replace the throttle body?

The engine cover is removed, if necessary.
The flexible rubber snorkel from the air filter housing to the throttle body is disconnected. Typically, the connection is made with a large stainless steel hose clamp.
The electrical connections to the throttle body are removed.
If the throttle body is not a drive-by-wire system, the accelerator cable and cruise control cable are disconnected and set aside.
The bolts retaining the throttle body to the plenum, the gasket, and the throttle body are removed. If the throttle body is being cleaned and tested for re-use, approved chemicals are used in the cleaning process.
The new or serviced throttle body is re-attached to the plenum and the bolts torqued to factory specifications.
All cables and electrical connections are restored. The intake air snorkel is reconnected.
If applicable, the electronic throttle installation and idle re-learn procedures are performed using an appropriate scan tool.
Finally, the engine is started, brought to normal operating temperature, and idle speed is checked. The car is road tested to ensure normal operation and no illumination of warning or service lights.

Is it safe to drive with a throttle body problem?

Yes. But, the vehicle may be limited in power or put into what is referred to as limp mode, in order to get the vehicle to a repair facility. If the check engine light is on, or the electronic throttle control warning light is on, but there is no noticeable difference in engine performance, the car can be safely driven. However, it is best to have it diagnosed and repaired at your earliest convenience to avoid unexpected breakdown or possible damage to the catalytic converter.

When replacing the throttle body keep in mind:

Many modern throttle bodies have spring loaded sensors and plastic gears that are not intended to be manipulated directly during any diagnostics or inspections. These components are controlled electronically or generate signals. It is best to let a mechanic use approved tests to diagnose the problem.
Wiring faults, bad grounds, or bad terminal connections can make it appear as though an electronically controlled throttle has failed. A mechanic will always rule out all other causes before replacing the throttle body.
When cleaning the throttle body, special care should be taken to use only special spray cleaners designed to not damage electrical components or sensors.

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Trevor

23 years of experience

185 reviews

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by Bill

Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Alternator Belt - Encinitas, California

Trevor showed up on time and had the work completed within the estimated time. Professional and friendly. I highly recommend Your Mechanic and Trevor. This was so easy, no up charges or surprises. I will use Your Mechanic for future auto services.

Bacle

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by Kamsik

Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Brake Pads Replacement (Front) - Mountain View, California

He will fix your problem no matter how much time it takes.

Robert

32 years of experience

646 reviews

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Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Noise from engine or exhaust - Mountain View, California

Robert is good or even better than the other reviews. He does not only solve your problem but he ensures that your car is at its best before he leaves. He tries very hard to make your car perfect. When parts are not available he will try to make it. I regret very much not to hive him a tip when he left. It seems that Robert has a very busy schedule. Perhaps, his devotion to perfection takes extra time and make him a little bit late on schedule.

Rocco

302 reviews

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by Russell

Mercedes-Benz 300SD L5-3.0L Turbo Diesel - Brake Pads Replacement (Front) - Newport Beach, California

Rocco was fantastic!

Mercedes-Benz 300SD Throttle Body Replacement at your home or office.

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Throttle Body Replacement Service

How much does a Throttle Body Replacement cost?

On average, the cost for a Mercedes-Benz 300SD Throttle Body Replacement is $1262 with $1080 for parts and $182 for labor. Prices may vary depending on your location.

What is the throttle body and how does it work?

When to consider replacing the throttle body:

How do mechanics replace the throttle body?

Is it safe to drive with a throttle body problem?

When replacing the throttle body keep in mind:

Meet some of our expert Mercedes-Benz mechanics

Excellent Rating

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Trevor

Bacle

Robert

Rocco

Excellent Rating

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