Mercedes-Benz 300SEL Drive Belt Tensioner Replacement at your home or office.

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

Get an upfront price

Service Area

Average rating from customers who
received a Drive Belt Tensioner Replacement.
Learn More

$455.07 - $482.07

Price range for all vehicles


YourMechanic Benefits

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.

Average rating from customers who
received a Drive Belt Tensioner Replacement.
Learn More


Drive Belt Tensioner Replacement Estimate for Mercedes-Benz 300SEL

Mercedes-Benz 300SEL Drive Belt Tensioner Replacement costs $469 on average.

CarServiceEstimateShop/Dealer Price
1991 Mercedes-Benz 300SELL6-3.0LService typeDrive Belt Tensioner ReplacementEstimate$707.67Shop/Dealer Price$883.17 - $1283.79
1988 Mercedes-Benz 300SELL6-3.0LService typeDrive Belt Tensioner ReplacementEstimate$707.67Shop/Dealer Price$882.89 - $1283.30
1990 Mercedes-Benz 300SELL6-3.0LService typeDrive Belt Tensioner ReplacementEstimate$707.67Shop/Dealer Price$883.17 - $1283.79
1989 Mercedes-Benz 300SELL6-3.0LService typeDrive Belt Tensioner ReplacementEstimate$721.17Shop/Dealer Price$893.27 - $1291.33
Show example Mercedes-Benz 300SEL Drive Belt Tensioner Replacement prices

Drive Belt Tensioner Replacement Service

What is the Drive Belt Tensioner all about?

A Drive Belt Tensioner is a pulley mounted to either a spring mechanism or to an adjustable pivot point that is used to keep constant tension on your serpentine belt. That is the big long belt in the front of your engine.

The tensioner rides on the outside surface of the belt to put pressure, or tension, on the belt and against the pulleys that drive things like the alternator, power steering, air conditioner, etc.

Keep in mind:

Tensioners usually come with pulleys; they are normally replaced together. Also, when replacing a tensioner, the drive belt usually must be removed. A mechanic may recommend replacing the belt as well.

How it's done:

  • Check for any noise in the engine (usually a squeaky or grinding noise).
  • Remove the drive belt(s) (in most cases).
  • Inspect drive belt pulleys.
  • Check the drive belt tensioner.
  • Remove and replace the tensioner if faulty.
  • Start car to see if noise is gone.

Our recommendation:

Your drive belt tensioner should always be inspected when your drive belt is serviced. During routine maintenance and inspection, your drive belt system should be reviewed to make sure that all the components are in working order. The drive belt tensioner will usually last longer than the drive belts, so as long as your tensioner is inspected or replaced when your drive belts are, your belt system should remain in good shape.

What common symptoms indicate you may need to replace the Drive Belt Tensioner?

Unusual noise (squeaky or grinding sound) every time you start the engine.

How important is this service?

The air conditioning, power steering, and alternator in your vehicle are given power through the drive belt. The belt is attached to both the crankshaft and these systems, and transfers power from the engine to drive each of these components. The drive belt tensioner is responsible for keeping the tension in the drive belt, which allows it to continue moving and transferring power. When the drive belt tensioner fails, the tension in the drive belt will begin to diminish, and the vehicle will not operate as well.

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

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


YourMechanic Mercedes-Benz Drive Belt Tensioner Replacement Service

Average Rating

5/5

Number of Reviews

29

Rating Summary
28
1
0
0
0
28
1
0
0
0

Robert

15 years of experience
28 reviews
Robert
15 years of experience
Mercedes-Benz 300SEL - Drive Belt Tensioner - Newtown Square, Pennsylvania
Robert has a positive attitude and is very professional. He got my vintage (ancient?) Mercedes all patched up and running again. I would definitely recommend Robert without hesitation!

William

28 years of experience
49 reviews
William
28 years of experience
Mercedes-Benz E350 - Drive Belt Tensioner Replacement - Waddell, Arizona
On time , professional and explain work performed in detail to include upcoming maintenance

Wayne

21 years of experience
65 reviews
Wayne
21 years of experience
Mercedes-Benz ML350 - Drive Belt Tensioner Replacement - Bothell, Washington
Wayne was awesome, he has great work experience and knowledge on how to attend repair.

Damian

9 years of experience
404 reviews
Damian
9 years of experience
Mercedes-Benz C230 - Drive Belt Tensioner Replacement - Bowie, Maryland
Excellent

Excellent Rating


YourMechanic Mercedes-Benz Drive Belt Tensioner Replacement Service

Average Rating

5/5

Number of Reviews

29

Rating Summary
28
1
0
0
0
28
1
0
0
0
Red-stars EXCELLENT RATING ON
Number of Mercedes-Benz Drive Belt Tensioner Replacement services completed
319+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
800+
experts on our platform

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.

1-800-701-6230 · hi@yourmechanic.com