Bexley Lane Garage

I took my Mercedes GLE into this garage for a B5 service. I am new to the area so needed to find a new Garage. i was quoted £280 for the full service. i agreed and brought my car in a few days later. after dropping the car off i receive a phone call from the garage trying to upsell me a few other things (air conditioning recharge, Brake fluid replacement and back window wiper). this too me over my budget to £417.. ok fine do all the extra work. came in later in the afternoon to collect my car and pay. was told my dipstick handle was missing. This is strange because i never touch my dipstick to check oil, i get it serviced every year and oil changed by the mechanic so either they broke it or it was my previous mechanic. im dubious about it but decide to pay the £18 for a replacement. Friday evening my check engine light comes on. It has never done this before in the 3 years i have had the vehicle. engine light on directly after ive had a service at a new garage is suspicious. i wait till Monday to query them about it thinking they could have innocently left something out of place and would investigate/rectify. straight off the bat the person on the phone is denying that the two things could be linked. I'm no mechanic but even i know that there is a possibility the two things could be linked. Could it be a coincidence that all these extras are happening to my car for the first time at a new garage. yes its possible. Could it be that these things happening to my car generating extra income is the way the garage operate. more than likely, yes. ive been booked in for Friday for them to inspect the vehicle, but i am worried they are going to do more damage that is going to cost me more money in the long run. I think its better to cut my losses then take it into this garage. cut a long story short, dont be surprised if your car develops new problems after you've taken it here. its how they make extra money