My 1994 420 S Merecedes changes gear but when I drive it it doesn't change to another gear

Asked by Sep 06, 2013 at 09:09 PM about the 1994 Mercedes-Benz S-Class S 420

Question type: Maintenance & Repair

5 Answers

23,045

Have you checked the transmission fluid level? it could be low.

1 out of 1 people think this is helpful.

We put fluid in it. Any other suggestions?

23,045

Someone on the Mercedes forum said they had the same issue, they cleaned the Mass Airflow Sensor and the problem went away. Im not shure if this will work for your car but it could be a cheap resolution if it fixes it.

I had a similar problem on a 1994 C280. I got a mechanic to clean the transmission lines under the car with brake part cleaner and the car drove like brand new . When I bought the car the transmission fluid was changed already but shifting crazy. Give it a shot !

mine was acting up the same way and was putting also. i had to clean the wheel sensors located by the hub of each wheel. its for anti skid stuff and when it gets dirty from brake dust and years of not being cleaned the sensor cant read the magnetic pulses the hub is sending by rotating. it then thinks the wheels are not spinning the same and wont allow you to give it gas let alone switch gears to go faster. also, i had the gas evap tube which is black plastic/rubber melt through. it goes into the air intake and has like 3 pieces to it. about a dime/10cents in diameter? nickel maybe? i couldnt get the strap off so i peeled as much as i could off ( where it connects to air intake. backside. you will see a hole when you take off the Mass airflow sensor.) and stuffed a slightly smaller tube in there. I used a small radiator tube so it could withstand the heat better. s420 1995

Your Answer

Add photo

Related Questions

  • Having a faulty or weak Alternator, would that have an effect on the automatic transmission shifting gear takes place early. Moreover the kick down doesn't work? 2 answers

    Alternator is faulty, will that have an effect on shifting up/ down of the transmission gear?

    1994 Mercedes-Benz S-Class S 500

    -

    Maintenance & Repair

  • gears hang up in 1995 S320 Mercedes 1 answer

    Gears hang up after a few miles, they do change but not right, if you let off the gas, they will change

    1995 Mercedes-Benz S-Class S 320 SWB

    -

    Maintenance & Repair

  • 1994 merc s420 tranny 2 answers

    '94 S420, transmission started slipping gears. I had a new(used 84k miles) tranny put in. Works fine when cold but when gets hot and i am on the frwy, gears suddenly wont shift down. it will be go 45 ...

    1994 Mercedes-Benz S-Class S 420

    -

    Maintenance & Repair

  • Mercedes s550 4matic won't shift 2 answers

    I just gave someone a jump on a car that's been sitting in the her for weeks, I drive off 30 minutes later my car stop going past first gear and when I shift it into gear i can hear it shift in har...

    2007 Mercedes-Benz S-Class S 550 4MATIC

    -

    Maintenance & Repair

  • 200cdi doesn't want to change gear 1 answer

    Hello i have an mercedes c class 200 cdi. I was driving today earlier the engine was cold. So i drive into highway it was going great.. suddenly it doesn't want to change gear. I was standing in the h...

    2002 Mercedes-Benz C-Class

    -

    Maintenance & Repair

S-Class

Looking for a Used S-Class in your area?

CarGurus has 7,014 nationwide S-Class listings starting at $3,000.

ZIP:

Search Mercedes-Benz S-Class Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercedes-Benz S-Class Experts

#1 Tom Demyan
Tom Demyan
Reputation 690
#2 Michael Kane
Michael Kane
Reputation 500
#3 lightGear
lightGear
Reputation 410
View All

Related Models For Sale

Used Mercedes-Benz E-Class
524 Great Deals out of 21,649 listings starting at $1,450
Used BMW 7 Series
152 Great Deals out of 5,596 listings starting at $1,600
Used Mercedes-Benz C-Class
824 Great Deals out of 31,297 listings starting at $2,200
Used Mercedes-Benz SL-Class
75 Great Deals out of 3,155 listings starting at $3,000
Used Land Rover Range Rover
88 Great Deals out of 4,589 listings starting at $5,000
Used BMW 5 Series
660 Great Deals out of 15,900 listings starting at $1,999
Used Jaguar XJ-Series
65 Great Deals out of 2,375 listings starting at $2,495

Used Cars For Sale

2017 Mercedes-Benz S-Class For Sale
1,890 listings starting at $93,685
2016 Mercedes-Benz S-Class For Sale
10 Great Deals out of 536 listings starting at $76,888
2015 Mercedes-Benz S-Class For Sale
9 Great Deals out of 549 listings starting at $57,890
2014 Mercedes-Benz S-Class For Sale
18 Great Deals out of 515 listings starting at $46,995
2013 Mercedes-Benz S-Class For Sale
7 Great Deals out of 238 listings starting at $30,900