1999 Mercedes-Benz S320 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1999 Mercedes-Benz S320

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1999 Mercedes-Benz S320 Problems

Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Erratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

Closing Assist/Door Lock Issues Due to Pneumatic System Problems

Problems with the pneumatic system can cause closing assist and door lock issues.

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1999 Mercedes-Benz S320 Questions

Anyone know how many miles you should get from a air suspension unit (1 answer)

Recently my nearside air suspension unit failed dropping the car dramatically,this turned out to be a quite expensive repair. The car has done 102000 miles.Would this be the normal lifespan of a air suspension unit, if so what is the likelihood of the remaining units failing.
Has anyone else had...

Bas/slr light is on and car seems disabled won't move over 5-10 miles per hour. (1 answer)

Battery went dead while car was parking. When I did the jump start it ran OK but lost throttle as the bas/slr light came on. Installed new battery but still light is on and throttle is not operational.

my 1999 s320 runs good but shuts off with out warning. (2 answers)

My car runs good but it shuts off, and then about half hour later it will start

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1999 Mercedes-Benz S320 Reviews

Very comfortable car seats and ride for any distance. Only problem I had is the dealer not having good mechanics to evaluate basic repairs. I am trying other mechanics though the dealer is walking distance.... I love this car ride. I would like to give it a new paint and take off any surface rust and keep it for ever...great 6 cyl. engine...great seats....runs on SUPER...
really good cars,just replace wear items and it won't let you dow.Want to beat 500s,its easy with a NOS Sniper nitrous 125 wet shot kit. My track times sor far 10.64@ 96 mpg.
My 1999 S320 is not as stylish as my W109 3.5. My S320 has electrical, airconditioning and drive train issues. Its simply becoming a pain in the neck. I wish Mercedes Benz can build an S class just like the W108/W109 and install a more efficient 8 cylinder engine. Nothing can be better than a W109 S class Mercedes Benz!

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