If you own a Mercedes-Benz GL450, you know that its suspension system is crucial for ride comfort and handling. Over time, components wear out, and finding quality replacement parts becomes a priority. Pelican Parts is a well-known supplier for European vehicles, offering a range of suspension parts for the GL450. This guide covers the key suspension components, what to look for when buying, and how to make a smart purchase.
Understanding the GL450 Suspension System
The GL450 typically comes with an air suspension system (Airmatic) or a conventional coil spring setup, depending on the trim and year. The air suspension provides a smooth ride and adjustable ride height, but it can be prone to issues like compressor failure, air leaks, or strut wear. The coil spring version is simpler and often more durable.
Common Suspension Problems
- Air strut leaks: The front or rear air struts can develop leaks, causing the vehicle to sag or the compressor to run frequently.
- Compressor failure: The air compressor can overheat or fail due to excessive cycling from leaks.
- Control arm bushings: Worn bushings cause clunking noises and imprecise steering.
- Sway bar links: Deteriorated links lead to body roll and noise over bumps.
What to Look for When Buying Suspension Parts at Pelican Parts
Pelican Parts offers OEM (Original Equipment Manufacturer), OE (original equipment quality), and aftermarket options. Here’s how to choose:
OEM vs. Aftermarket
- OEM: Genuine Mercedes parts, highest quality and fit, but most expensive.
- OE (e.g., Bilstein, Monroe): Made to OEM specifications, often at a lower price. Good balance.
- Aftermarket (e.g., Arnott, Dorman): More affordable, but quality varies. Some aftermarket air struts are reliable.
Key Components
Air Struts
For air suspension GL450s, the front and rear air struts are common replacements. Pelican Parts stocks brands like Arnott, which are known for remanufactured units with lifetime warranties. Also available are new OEM struts from Mercedes. When choosing, consider:
- Warranty: Arnott offers a lifetime warranty; OEM comes with a 2-year parts warranty.
- Price: Aftermarket can be 30-50% less than OEM.
- Performance: Aftermarket struts may have slightly different damping characteristics.
Air Compressor
If the compressor fails, you may need to replace it. Pelican Parts has OEM compressors and aftermarket options from companies like Hella. Note: replace the dryer and check for leaks before installing a new compressor.
Control Arms and Bushings
Worn control arms can cause vibrations and tire wear. Pelican Parts sells complete control arm kits (upper and lower) with bushings pre-installed. Brands like Lemförder (OE) are recommended. For cost savings, you can buy just the bushings, but pressing them requires tools.
Sway Bar Links and Bushings
These are inexpensive and easy to replace. Pelican Parts has OEM and aftermarket links from Moog (improved greaseable design).
Compatibility and Fit
Always verify fitment using your vehicle’s VIN or model year. The GL450 underwent changes in 2009 (facelift) and 2013 (model change to GL-Class). Pelican Parts website has a fitment checker.
How to Decide What to Replace
If you have a diagnostic code related to ride height or compressor, inspect the air struts for leaks (use soapy water). If the ride is bouncy or sagging, likely the struts. For clunks, check control arm bushings and sway bar links. Pelican Parts offers buying guides and installation tips on their site.
Cost Considerations
- Air struts: $200–$800 each (aftermarket) vs. $600–$1200 OEM.
- Compressor: $300–$600.
- Control arm kit (front): $250–$600.
- Sway bar links: $30–$80 each.
Labor for installation can be high, especially for air suspension work. If you DIY, Pelican Parts provides detailed DIY articles.
Practical Buying Tips
- Check the whole system: Fixing only a leaking strut without replacing the dryer can lead to compressor failure.
- Consider a full air suspension conversion: If you want reliability, you can convert to coil springs using a kit like those from Arnott or Strutmasters. Pelican Parts sells conversion kits.
- Buy in kits: Pelican Parts offers complete suspension kits (struts, mounts, etc.) for front or rear, which can save money.
- Use filters: When sorting parts, use the “OEM/OE” filter for quality, or “aftermarket” for budget.
- Read customer reviews: On Pelican Parts, reviews can indicate ease of installation and durability.
Final Recommendation
For most GL450 owners, the best approach is to start with a thorough inspection to pinpoint the failed components. If budget allows, choose OEM or OE parts for critical items like air struts and control arms to ensure longevity and proper ride quality. For less critical parts like sway bar links, aftermarket options like Moog are fine. Pelican Parts is a reliable source with good customer support and clear fitment information. If you are handy, their DIY resources can guide you through the repair. For a long-term solution, consider the Arnott air struts with a lifetime warranty – they offer a great balance of cost and reliability.