mjeagent

I've got a 2015 S65 with Continental 285/35 ZR20s. I got a puncture a few weeks back on the passenger side rear tire. Brought it to a local tire shop and they did a patch. Hasn't driven right since. I got a good bit of lateral movement (side to side in driver seat while driving) and rough ride. Before patch it was very smooth riding. I brought it back to tire shop to have them check the alignment but told me that they haven't received the specs to do an alignment which leads me to believe that they did not do an alignment following the patch. When I inquired about that they said that they typically don't do an alignment with a patch. They also filled all four tires to max psi (51) so I let a good bit of air out of each to see if that helps. Now I know that I should have taken the car to my MB dealership but its quite a distance away. Any thoughts???

Streamliner

I don't mean to be a jerk, but with what, a $250K car here, with monster power on tap, just go and get a frigging brand new tire or maybe two.

mjeagent

Right, I've got no problem doing that - I got quoted $350 or so a tire from what I remember - I just want to make sure that's the problem. Could a patched tire cause the vehicle to ride rough and cause lateral sway? I'll probably have to breakdown and bring it to the stealership and won't see it for 2 weeks.

LovinMercedes

Driving a S65, with the stress that is put on the tires with that amount of power, I'd say that wasn't the best decision.

You need a new tire.

Arlen777

Well yeah but then if he would keep buying new tires everytime he got a puncture he wouldn't be able to buy new s65

LovinMercedes

This is a joke... right?

drsaab

I don't see why a patch in the tire would need an alignment. Maybe they never balanced it correctly, that seems like the most likely cause. Get a road force balance done.

Arlen777

No. I didnt mean it literally, meaning if you blow money left and right you wouldnt be where you at, and in position to buy expensive car.

RajwanyS550

just got a flat warning on my display yesterday, showing low tire pressure on one of the tires. took it to discount tire and they patched it back up with road force balancing. no problems at all. BTW cost of 20" goodyear F1 runflats were 416+tx.
You dont need an alignment after a tire leak, just balancing.

RajwanyS550

OFF TOPIC!! i think people who buy these cars brand new should be able to throw money left and right. its called disposable money....

Critter

If the shop filled your tires to 51PSI, you have gone to the wrong place. Chances are they bent the rim taking off the tire and reinstalling it. Watch a guy at a dealership a few years back using a 6 foot pry bar to turn the machine to install a brand new tire, made me cringe, did this to all, owner not in sight.
There is no need to align a car for this repair, but has been said on the forum, I also would second guess their service. A new tire is not necessarily needed but who knows what procedure was used in the installation of the patch.
Find a reputable tire shop for your future needs. 51 pounds is no where professional, wonder what this idiot used for a gauge??
Spend some cash on a decent tire pressure gauge, they come in handy. Picked up a small one that has a magnet on the back that sticks on the inside of the gas tank flap. Always there and ready to be used.

Quadcammer

They may have inflated to 51psi to seat the bead and never bled it down to the correct pressure.

I'd probably take it to a reputable tire shop to have it checked.

FWIW, there is a difference between disposable funds and wasted money.

Patching a tire correctly is perfectly legitimate and would not cause the issues in the OP. Unless you are tracking or doing regular 200mph blasts, a patched tire is absolutely fine. Why spend $350 when you don't have to?

LovinMercedes

Nothing personal...because it's your life.

Critter

Quadcammer, op stated they filled all tires to 51psi. Which in itself would lead me to believe they do not have a clue, hence the checking of the patch installation process.
Yes a patched tire is safe as long as it was done correctly. But also as stated if you run high speeds a foreign object on the road will cause just as much damage to a new tire as it will a patched tire. You never know when traveling high speed just what is in front of you, its not like a race track where the same pavement keeps coming back.

Quadcammer

yawn, if you think a properly patched tire creates any significant danger, you are simply misinformed.

waste your money if you like.

LovinMercedes

I apologize for belaboring the point, but your answer is my point. "...properly..." and "...any..."

Not taking that risk for $350. I used to work in a high-end tire shop. I know what happens, even at the better places.

There are lots of places in your car where things can go wrong without significant danger. Your tires are not one of them.

Quadcammer

ok, well we pays our money and takes our chances. good luck to the op.

mjeagent

Car is in for service. I will keep you guys updated.