Tag: serpentine

Mercedes CLS55 AMG W219, New Serpentine Belt Tensioner

What do you do when you have a noisy serpentine belt tensioner? You replace it with a new one off course! Never skip an opportunity to buy new shiny parts 🙂

I was able to find a Trucktec Automotive tensioner for the m113k engine, which has a steel pulley instead of the known-to-fail plastic pulley. It’s an easy DIY task, the most time is spent on removing parts to get access to the tensioner.

Trucktec Automotive serpentine belt tensioner with steel pulley

Trucktec Automotive serpentine belt tensioner vs OE Mercedes Benz serpentine belt tensioner

New serpentine belt tensioner in place!



Mercedes CLS55 AMG W219, Original Gates Serpentine Belt 1139970292 6K2449

Replaced the Contitech 6K2445 serpentine belt with an original Gates belt and was very surprised to see the actual difference. The ribs of the OE Gates belt are significantly thicker than the Contitech (Continental), something I did not expect to see.

Even though it’s way more expensive than the Contitech (about 70 euro vs 20 euro), I’m happy that I have chosen the Original OE option.

Partnr: 1139970292 6K2449

Mercedes-AMG Gates 1139970292 6K2449 Made in Spain serpentine belt

Mercedes Gates OE 1139970292 6K2449 serpentine belt vs Continental Contitech belt




Mercedes CLS55 AMG W219, Replacing The Crankshaft Double Pulley

After a incident in the garage, I had the idea that the crank pulley had a slight wobble. As these pulleys are known to separate (after a long period), I didnt feel comfortable with the car and made the decision to get this replaced.

Off course, its not a cheap item to replace, as this is an AMG specific item (2 belts running of the crank pulley, 1 for the accessory belt (6 ribs) and 1 for the supercharger (8 ribs)).

I went to Mercedes specialist Ralph Eidams in Brunssum where they were able to replace it within the hour, keeping down costs on labour. Even though it probably wasn’t necessary, I ultimately did it for peace of mind. I also let them replace the front main axle seal (krukaskeerring).

Partnr crankshaft pulley: A1130300103

Partnr crankshaft pulley bolt: 0009900200

Partnr front main seal: A0239978447

Ralph Eidams: https://www.ralpheidamsmercedes.nl/

CLS55 on the 2 post ramp

Mercedes CLS W219 on the 2 post ramp

Old crankshaft pulley out

New crankshaft pulley A1130300103 in place!




Volvo S80 2.4T New Serpentine Belt Tensioner

Finally fitted a new serpentine belt tensioner, needed to wait for a Torx T60 bit to be able to take the tension of when you fit the serpentine belt.

Volvo S80 2.4T New Serpentine Belt Tensioner