Mercedes-Benz 400SE Gas cap won't click or tighten Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(5,730)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(5,730)

Gas cap won't click or tighten Inspection Service

How much does a Gas cap won't click or tighten Inspection cost?

On average, the cost for a Mercedes-Benz 400SE Gas cap won't click or tighten Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1992 Mercedes-Benz 400SEV8-4.2LService typeGas cap won't click or tighten InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
Show example Mercedes-Benz 400SE Gas cap won't click or tighten Inspection prices

One of the more disconcerting things that can happen in your car is the Check Engine warning light. And while the Check Engine light should never be taken lightly, often the problem is remarkably simple: a gas cap that won’t click or tighten.

How this system works:

Your gas cap is a very simple screw top lid. Unlike, say, a mason jar, the cap to your gas tank has the threads, rather than the tank itself. The purpose of the gas cap is to keep the gas in your vehicle secure. Without a gas cap, the gas can slosh out of the tank, or evaporate, and it is more prone to freak accidents that could cause fires, explosions, or internal damage to your vehicle.

Common reasons for this to happen:

There are four reasons why a gas cap won’t click or tighten:

  • Damaged gas cap: A damaged gas cap is far and away the most common culprit for a gas cap that won’t click or tighten. Gas caps with damaged threading won’t be able to lock tightly into the gas tank. Sometimes you can see a crack or break in the gas cap, but often the damage is not visible. Certain makes and models have notoriously finicky gas caps, and some have even resulted in recalls.

  • Damaged gas tank threading: The gas cap is part of a two-piece equation. There’s the gas cap, with the outward threading, and the top of the gas tank, with the track for the threading. If this track for the threading becomes damaged, the threading has nowhere to lock into, and the gas cap won’t click or tighten.

  • Dirty cap or tank: Everyone has accidentally tried to screw on the lid to a jar when something was caught in the threading. It simply won’t work. A gas cap is no different; if there’s debris in the threading of the gas cap, or in the track of the tank, the cap won’t screw on correctly.

  • Broken spring load: Many gas caps are spring loaded. These gas caps rely on a spring that holds the cap in place when it is locked in. If this spring breaks or is damaged in any way, there will be no pressure holding the cap in place.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the cause of the gas cap that isn’t clicking or tightening, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

A mechanic will assess your gas cap and gas tank and should easily be able to determine the cause of the problem. After figuring out why the cap won’t click or tighten, the mechanic will clean, repair, or replace the component that is not working. A malfunctioning gas cap is one of the simplest repairs in the automotive industry.

How important is this service?

A gas cap isn’t the most vital part of your vehicle, but it is something that should be in working condition. A properly working gas cap is a safety measure, and keeps debris from getting into your gas tank. A gas cap that won’t properly tighten will often trigger the Check Engine warning light. If you don’t get the gas cap replaced, the light will stay on, and you won’t be alerted if another, more severe issue arises.

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

(5,730)

Rating Summary
5,332
192
54
29
123
5,332
192
54
29
123

Dana

25 years of experience
13 reviews
Dana
25 years of experience
Mercedes-Benz CL63 AMG V8-5.5L Turbo - Oil Change - Fairfax, Virginia
Job well done .

Gregory

11 years of experience
27 reviews
Gregory
11 years of experience
Mercedes-Benz CLK500 V8-5.0L - inspect front brakes as follow up to prior service inspection notes of rotors overheated. 50-point inspection as normal for service call, I expect intermittent headlight operation determine cause and repair if possible. - Fresno, California
Very nice and honest

Arturo

27 years of experience
303 reviews
Arturo
27 years of experience
Mercedes-Benz GLK350 V6-3.5L - Starter - Chula Vista, California
Arturo was great, fast work ,knowledgeable, Friendly . Definitely will select Arturo again

Joshua

27 years of experience
709 reviews
Joshua
27 years of experience
Mercedes-Benz ML350 V6-3.5L - Oil Change - Antioch, California
great

Excellent Rating

(5,730)

Rating Summary
5,332
192
54
29
123
5,332
192
54
29
123
Number of Mercedes-Benz services completed
63030+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing Differential Output Seal
Common signs include whining sounds and oil leaks coming from the differential.
How to Buy a Used Car on AutoTrader
The The online vehicle aggregator site AutoTrader.com (http://www.autotrader.com/) allows you to quickly and effectively search through thousands of used vehicles sold by dealers and private sellers. On the AutoTrader site, you can find vehicle reviews, advice for shopping, and car...
How to Check Suspension Ball Joints
Ball joints are a suspension component that is found on virtually all vehicles. Ball joints are flexible joints...

Door stuck open

It sounds like the latch that holds the door closed may be stuck in the closed position, preventing the door from shutting fully. This latch is located inside the door, but is visible while the door is open. It may...

Wrong antifreeze and fuel additive used and the car is noisy and runs roughly

This vehicle should not be run any at all until it can be diagnosed and repaired. In cases where coolant has been put into the engine, this can damage various engine components such as the bearings, pistons and crankshaft. The...

Topped off coolant with Prestone Universal Coolant. Manual says to use MOPAR HOAT. Do I need to get a flush before a long trip?

Not knowing which exact type of coolant was used to refill the system after the block heater install, I would consider flushing the cooling system and refilling with the correct coolant. Years ago, we just had "green coolant that went...

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 (844) 997-3624 · hi@yourmechanic.com