Mercedes-Benz CLS 450 Wheel Repair Review - Saved ₩1.5 Million
Service Price
$150+
Estimated price · Actual price may vary by shop
Mercedes-Benz CLS 450 wheel repair: Saved ₩1.5 million with argon welding for cracks. Restored safety and appearance.
Why Mercedes-Benz CLS 450 Wheels Crack Easily
Many Mercedes-Benz CLS 450 owners report a common issue: their "chariot" style wheels frequently develop cracks. This often happens even without hitting potholes or experiencing significant impacts. The design of these Mercedes wheels concentrates stress in specific areas, making them more susceptible to damage than standard wheels. As they are typically made from aluminum alloy, once a crack starts, it tends to spread rapidly.
This review details the argon welding repair process for a CLS 450 wheel that cracked due to a pothole incident. A common question is whether a cracked wheel must always be replaced. The answer is often no, especially in the early stages, where argon welding can be a sufficient solution. However, a precise diagnosis is crucial as the repair method can depend on the crack's severity.
Wheel Condition Upon Arrival: Air Leaking
The CLS 450 arrived with a completely deflated tire, indicating a significant air leak. Upon inspection, a deep, visible crack was found on the inner bead of the "chariot" style wheel, explaining the air loss. Many Mercedes owners are told by official service centers that replacement is the only option, with costs around 1.5 million Korean Won per wheel and a 1-2 week waiting period for new parts. However, opting for argon welding beforehand can significantly reduce costs and turnaround time.
The Argon Welding Process
Argon welding uses argon gas as a shield to protect the aluminum during the welding process. The tire is completely removed before welding is performed on both the inner and outer sides of the wheel. The key to a strong repair is not just a single weld, but a minimum of two overlapping layers to reinforce the damaged area.
How it works:
- Crack Preparation: The cracked area is meticulously cleaned and prepared to ensure optimal weld penetration.
- Inner Wall Welding: The deep crack on the inner wall is addressed first. Given the severity, the weld is applied deeper than the original crack to enhance structural integrity.
- Outer Wall Reinforcement: The outer wall, also prone to cracking on stock wheels, receives a double-layer weld for increased strength, often thicker than the original wheel material.
- Surface Finishing: After welding, the bead area where the tire seats is precisely smoothed to prevent tire damage and ensure an airtight seal.
- Leak Testing: The repaired wheel is fitted with a tire, and a thorough leak test is conducted using soapy water to detect any minute air bubbles.
Seamless Finish and Final Inspection
Following the welding, the crucial step is the finishing. The tire bead seating area must be perfectly smooth. Any roughness here could lead to tire damage or air leaks. The lines were meticulously refined. After the repair, the tire was remounted, ensuring the bead seated correctly and there were no leaks. A comprehensive air leak test was performed, submerging the wheel in soapy water to check the entire weld and bead area for even the smallest bubbles. The CLS 450 was then cleared for safe road driving.
Frequently Asked Questions
Q. How much does wheel repair cost for a Mercedes-Benz CLS 450?
This specific repair saved the owner approximately 1.5 million Korean Won compared to replacement. Typical wheel repair costs in the US can range from $150 to $400 per wheel, depending on the damage.
Q. Can curb rash be fully repaired on Mercedes-Benz CLS 450 wheels?
Yes, minor curb rash and cosmetic damage can often be fully repaired through sanding, filling, and repainting. For deeper damage or structural issues like cracks, specialized welding and refinishing are necessary to restore integrity and appearance.
Q. Is wheel repair or replacement cheaper for a Mercedes-Benz CLS 450?
Wheel repair, particularly through methods like argon welding for cracks, is significantly cheaper than full replacement, as demonstrated by the 1.5 million Korean Won saving in this case. Repair is ideal for structural damage that can be safely fixed, while replacement is necessary for severely compromised wheels.
Q. How is wheel curb rash repaired on a Mercedes-Benz CLS 450?
Wheel repair for curb rash typically involves these steps: 1. The damaged area is carefully sanded down to remove imperfections and smooth the metal. 2. Minor imperfections may be filled with specialized alloys or epoxies. 3. The repaired section is primed, painted to match the original finish, and clear-coated for protection. 4. The wheel is cured to ensure durability.
Q. What is the difference between wheel refinishing and full replacement for a Mercedes-Benz CLS 450?
Wheel refinishing restores the wheel's appearance and can fix minor damage like curb rash or scratches, while full replacement is necessary when the wheel has severe structural damage like major cracks or bends that cannot be safely repaired. Refinishing is a cosmetic and minor repair solution, whereas replacement addresses fundamental structural integrity issues.
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