Engine
Oil Cooler Hose Leaks and Failure on Older Mercedes (especially OM 616 and OM 617 Diesels)
Failure of these hoses can lead to total destruction of your engine
W123, Specialty Tools
Climate Control
Intermittent Cabin Heat - Second Generation Climate Control
Applies to late 123 and 107 chassis and all 126 chassis 1981 to 1991
Brake
Determining If Your Brake Booster Has Failed
Don't be too hasty to buy a new one
Fuel Delivery
Diesel Engine Fuel Filters
Major cause of sudden loss of power
Engine
Loose Alternator Belt on 1970's Models
Adjustment procedure must be followed properly!!!
Interior
Power Window Troubleshooting
When all else fails check the wiring
Engine
Diesel Engine Transmission Torque Converter Flex Plate Failure
This can be difficult to diagnose
Electrical
O.E. Aluminum Fuse Failure
One of the most common problems we see on older Mercedes.
Fuel Delivery
Fuel Leaks at Rear of Car
Fix at first sign of wetness under car - BEFORE total failure
Rust / Corrosion
Keeping the 123 Engine Compartment Front Water Drains Clear
Failure to do this can lead to big problems on these models